<s>
This	O
article	O
provides	O
a	O
list	B-Library
of	I-Library
widget	I-Library
toolkits	I-Library
(	O
also	O
known	O
as	O
GUI	B-Library
frameworks	I-Library
)	O
,	O
used	O
to	O
construct	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
(	O
GUI	B-Application
)	O
of	O
programs	O
,	O
organized	O
by	O
their	O
relationships	O
with	O
various	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
macOS	B-Application
uses	O
Cocoa	B-Operating_System
.	O
</s>
<s>
Mac	B-Application
OS	I-Application
9	O
and	O
macOS	B-Application
used	O
to	O
use	O
Carbon	B-Operating_System
for	O
32-bit	O
applications	O
.	O
</s>
<s>
The	O
Windows	B-Library
API	I-Library
used	O
in	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
The	O
Haiku	B-Language
operating	I-Language
system	I-Language
uses	O
an	O
extended	O
and	O
modernised	O
version	O
of	O
the	O
Be	B-Language
API	I-Language
that	O
was	O
used	O
by	O
its	O
spiritual	O
predecessor	O
BeOS	B-Application
.	O
</s>
<s>
Haiku	B-Language
Inc	O
.	O
is	O
expected	O
to	O
drop	O
binary	O
and	O
source	O
compatibility	O
with	O
the	O
BeOS	B-Application
at	O
some	O
point	O
in	O
the	O
future	O
,	O
which	O
will	O
result	O
in	O
its	O
own	O
Haiku	B-Language
API	B-General_Concept
.	O
</s>
<s>
The	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
contains	O
primitive	O
building	O
blocks	O
,	O
called	O
Xt	B-Language
or	O
"	O
Intrinsics	O
"	O
,	O
but	O
they	O
are	O
mostly	O
only	O
used	O
by	O
older	O
toolkits	O
such	O
as	O
:	O
OLIT	B-Library
,	O
Motif	B-Application
and	O
Xaw	B-Library
.	O
</s>
<s>
Most	O
contemporary	O
toolkits	O
,	O
such	O
as	O
GTK	B-Application
or	O
Qt	B-Language
,	O
bypass	O
them	O
and	O
use	O
Xlib	B-Language
or	O
XCB	B-Language
directly	O
.	O
</s>
<s>
The	O
Amiga	B-Application
OS	I-Application
Intuition	B-Application
was	O
formerly	O
present	O
in	O
the	O
Amiga	B-Device
Kickstart	O
ROM	O
and	O
integrated	O
itself	O
with	O
a	O
medium-high	O
level	O
widget	B-Library
library	I-Library
which	O
invoked	O
the	O
Workbench	B-Operating_System
Amiga	B-Device
native	O
GUI	B-Application
.	O
</s>
<s>
Since	O
Amiga	B-Application
OS	I-Application
2.0	O
,	O
Intuition.library	B-Application
became	O
disk	O
based	O
and	O
object	O
oriented	O
.	O
</s>
<s>
Also	O
Workbench.library	O
and	O
Icon.library	O
became	O
disk	O
based	O
,	O
and	O
could	O
be	O
replaced	O
with	O
similar	O
third-party	O
solutions	O
.	O
</s>
<s>
BOOPSI	B-Device
(	O
Basic	O
Object	O
Oriented	O
Programming	O
System	O
for	O
Intuition	B-Application
)	O
was	O
introduced	O
with	O
OS	O
2.0	O
and	O
enhanced	O
Intuition	B-Application
with	O
a	O
system	O
of	O
classes	O
in	O
which	O
every	O
class	O
represents	O
a	O
single	O
widget	O
or	O
describes	O
an	O
interface	O
event	O
.	O
</s>
<s>
MUI	B-Library
:	O
object-oriented	O
GUI	B-Library
toolkit	I-Library
and	O
the	O
official	O
toolkit	O
for	O
MorphOS	B-Operating_System
.	O
</s>
<s>
ReAction	B-Library
:	O
object-oriented	O
GUI	B-Library
toolkit	I-Library
and	O
the	O
official	O
toolkit	O
for	O
AmigaOS	B-Application
.	O
</s>
<s>
Zune	B-Library
(	O
GUI	B-Library
toolkit	I-Library
)	O
is	O
an	O
open	O
source	O
clone	O
of	O
MUI	B-Library
and	O
the	O
official	O
toolkit	O
for	O
AROS	B-Application
.	O
</s>
<s>
Cocoa	B-Operating_System
-	O
used	O
in	O
macOS	B-Application
(	O
see	O
also	O
Aqua	B-Application
)	O
.	O
</s>
<s>
As	O
a	O
result	O
of	O
macOS	B-Application
 '	O
OPENSTEP	B-Operating_System
lineage	O
,	O
Cocoa	B-Operating_System
also	O
supports	O
Windows	O
,	O
although	O
it	O
is	O
not	O
publicly	O
advertised	O
as	O
such	O
.	O
</s>
<s>
An	O
outdated	O
and	O
feature-limited	O
open-source	O
subset	O
of	O
Cocoa	B-Operating_System
exists	O
within	O
the	O
WebKit	B-Language
project	O
,	O
however	O
;	O
it	O
is	O
used	O
to	O
render	O
Aqua	B-Application
natively	O
in	O
Safari	B-Application
(	O
web	O
browser	O
)	O
for	O
Windows	O
.	O
</s>
<s>
Apple	B-Operating_System
's	I-Operating_System
iTunes	I-Operating_System
,	O
which	O
supports	O
both	O
GDI	O
and	O
WPF	B-Device
,	O
includes	O
a	O
mostly	O
complete	O
binary	O
version	O
of	O
the	O
framework	O
as	O
"	O
Apple	O
Application	O
Support	O
"	O
.	O
</s>
<s>
Carbon	B-Operating_System
-	O
the	O
deprecated	O
framework	O
used	O
in	O
macOS	B-Application
to	O
port	O
“	B-Application
classic	I-Application
”	I-Application
Mac	I-Application
applications	O
and	O
software	O
to	O
the	O
macOS	B-Application
.	O
</s>
<s>
MacApp	B-Operating_System
,	O
the	O
framework	O
for	O
the	O
Classic	B-Application
Mac	I-Application
OS	I-Application
by	O
Apple	O
.	O
</s>
<s>
PowerPlant	B-Library
,	O
the	O
framework	O
for	O
the	O
Classic	B-Application
Mac	I-Application
OS	I-Application
by	O
Metrowerks	O
.	O
</s>
<s>
The	O
Microsoft	B-Language
Foundation	I-Language
Classes	I-Language
(	O
MFC	B-Language
)	O
,	O
a	O
C++	B-Language
wrapper	O
around	O
the	O
Windows	B-Library
API	I-Library
.	O
</s>
<s>
The	O
Object	B-Language
Windows	I-Language
Library	I-Language
(	O
OWL	B-Language
)	O
,	O
Borland	O
's	O
alternative	O
to	O
MFC	B-Language
.	O
</s>
<s>
The	O
Visual	B-Library
Component	I-Library
Library	I-Library
(	O
VCL	B-Library
)	O
is	O
Embarcadero	O
's	O
toolkit	O
used	O
in	O
C++Builder	B-Language
and	O
Delphi	B-Language
.	O
</s>
<s>
It	O
wraps	O
the	O
native	O
Windows	O
controls	O
,	O
providing	O
object-oriented	O
classes	O
and	O
visual	O
design	O
,	O
although	O
also	O
allowing	O
access	O
to	O
the	O
underlying	O
handles	O
and	O
other	O
WinAPI	B-Library
details	O
if	O
required	O
.	O
</s>
<s>
It	O
was	O
originally	O
implemented	O
as	O
a	O
successor	O
to	O
OWL	B-Language
,	O
skipping	O
the	O
OWL/MFC	O
style	O
of	O
UI	O
creation	O
,	O
which	O
by	O
the	O
mid-nineties	O
was	O
a	O
dated	O
design	O
model	O
.	O
</s>
<s>
Windows	B-Application
Forms	I-Application
(	O
WinForms	B-Application
)	O
is	O
Microsoft	O
's	O
.NET	B-Application
set	O
of	O
classes	O
that	O
handle	O
GUI	B-Application
controls	O
.	O
</s>
<s>
In	O
the	O
cross-platform	O
Mono	B-Application
implementation	O
,	O
it	O
is	O
an	O
independent	O
toolkit	O
,	O
implemented	O
entirely	O
in	O
managed	O
code	O
(	O
not	O
wrapping	O
the	O
Windows	B-Library
API	I-Library
,	O
which	O
does	O
n't	O
exist	O
on	O
other	O
platforms	O
)	O
.	O
</s>
<s>
WinForms	B-Application
 '	O
design	O
closely	O
mimics	O
that	O
of	O
the	O
VCL	B-Library
.	O
</s>
<s>
The	O
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
(	O
WPF	B-Device
)	O
is	O
the	O
graphical	O
subsystem	O
of	O
the	O
.NET	B-Application
Framework	I-Application
3.0	O
.	O
</s>
<s>
User	O
interfaces	O
can	O
be	O
created	O
in	O
WPF	B-Device
using	O
any	O
of	O
the	O
CLR	O
languages	O
(	O
e.g.	O
</s>
<s>
C#	B-Application
)	O
or	O
with	O
the	O
XML-based	O
language	O
XAML	B-Device
.	O
</s>
<s>
Microsoft	B-Application
Expression	I-Application
Blend	I-Application
is	O
a	O
visual	O
GUI	B-Application
builder	O
for	O
WPF	B-Device
.	O
</s>
<s>
The	O
Windows	B-Language
UI	I-Language
Library	I-Language
(	O
WinUI	B-Language
)	O
is	O
the	O
graphical	O
subsystem	O
of	O
universal	O
apps	O
.	O
</s>
<s>
User	O
interfaces	O
can	O
be	O
created	O
in	O
WinUI	B-Language
using	O
C++	B-Language
or	O
any	O
of	O
the	O
.NET	B-Language
languages	I-Language
(	O
e.g.	O
,	O
C#	B-Application
)	O
or	O
with	O
the	O
XML-based	O
language	O
XAML	B-Device
.	O
</s>
<s>
Microsoft	B-Application
Expression	I-Application
Blend	I-Application
is	O
a	O
visual	O
GUI	B-Application
builder	O
that	O
supports	O
WinUI	B-Language
.	O
</s>
<s>
Note	O
that	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
was	O
originally	O
primarily	O
for	O
Unix-like	O
operating	B-General_Concept
systems	I-General_Concept
,	O
but	O
it	O
now	O
runs	O
on	O
Microsoft	B-Application
Windows	I-Application
as	O
well	O
using	O
,	O
for	O
example	O
,	O
Cygwin	B-Language
,	O
so	O
some	O
or	O
all	O
of	O
these	O
toolkits	O
can	O
also	O
be	O
used	O
under	O
Windows	O
.	O
</s>
<s>
Motif	B-Application
used	O
in	O
the	O
Common	B-Application
Desktop	I-Application
Environment	I-Application
.	O
</s>
<s>
LessTif	B-Application
,	O
an	O
open	O
source	O
(	O
LGPL	B-Application
)	O
version	O
of	O
Motif	B-Application
.	O
</s>
<s>
Xaw	B-Library
,	O
the	O
Project	B-Operating_System
Athena	I-Operating_System
widget	B-Library
set	I-Library
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
.	O
</s>
<s>
Elementary	B-Library
,	O
open	O
source	O
(	O
LGPL	B-Application
)	O
,	O
a	O
part	O
of	O
the	O
Enlightenment	B-Library
Foundation	I-Library
Libraries	I-Library
,	O
a	O
fast	O
,	O
stable	O
,	O
and	O
scalable	O
library	O
that	O
can	O
be	O
used	O
to	O
create	O
both	O
rich	O
and	O
fast	O
applications	O
that	O
can	O
be	O
used	O
on	O
anything	O
from	O
every	O
day	O
desktop	O
computers	O
to	O
small	O
PDA	O
's	O
and	O
set-top	O
boxes	O
.	O
</s>
<s>
GTK	B-Application
,	O
open	O
source	O
(	O
LGPL	B-Application
)	O
,	O
primarily	O
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
,	O
ported	O
to	O
and	O
emulated	O
under	O
other	O
platforms	O
;	O
used	O
in	O
the	O
GNOME	B-Application
,	O
Rox	B-Language
,	O
LXDE	B-Language
and	O
Xfce	B-Language
desktop	O
environments	O
.	O
</s>
<s>
IUP	B-Language
,	O
open	O
source	O
(	O
MIT	B-License
)	O
,	O
a	O
minimalist	O
GUI	B-Library
toolkit	I-Library
in	O
ANSI	O
C	B-Language
for	O
Windows	O
,	O
UNIX	B-Application
and	O
Linux	O
.	O
</s>
<s>
Tk	B-Application
,	O
open	O
source	O
(	O
BSD-style	O
)	O
,	O
a	O
widget	B-Library
set	I-Library
accessed	O
from	O
Tcl	B-Operating_System
and	O
other	O
high-level	O
script	O
languages	O
(	O
interfaced	O
in	O
Python	B-Language
as	O
Tkinter	B-Language
)	O
.	O
</s>
<s>
CEGUI	B-Language
,	O
open	O
source	O
(	O
MIT	B-License
License	I-License
)	O
,	O
cross-platform	O
widget	B-Library
toolkit	I-Library
designed	O
for	O
game	O
development	O
,	O
but	O
also	O
usable	O
for	O
applications	O
and	O
tool	O
development	O
.	O
</s>
<s>
FLTK	B-Language
,	O
open	O
source	O
(	O
LGPL	B-Application
)	O
,	O
cross-platform	O
toolkit	O
designed	O
to	O
be	O
small	O
and	O
fast	O
.	O
</s>
<s>
FOX	B-Language
toolkit	I-Language
,	O
open	O
source	O
(	O
LGPL	B-Application
)	O
,	O
cross-platform	O
toolkit	O
.	O
</s>
<s>
GLUI	O
,	O
a	O
very	O
small	O
toolkit	O
written	O
with	O
the	O
GLUT	B-Library
library	O
.	O
</s>
<s>
Juce	B-Language
provides	O
GUI	B-Application
and	O
widget	B-Library
set	I-Library
with	O
the	O
same	O
look	O
and	O
feel	O
in	O
Microsoft	B-Application
Windows	I-Application
,	O
X	B-Operating_System
Window	I-Operating_System
Systems	I-Operating_System
,	O
macOS	B-Application
and	O
Android	O
.	O
</s>
<s>
Rendering	O
can	O
be	O
based	O
on	O
OpenGL	B-Application
.	O
</s>
<s>
Qt	B-Language
,	O
proprietary	O
and	O
open	O
source	O
(	O
GPL	B-License
,	O
LGPL	B-Application
)	O
available	O
under	O
Unix	B-Application
and	O
Linux	O
(	O
with	O
X11	B-Operating_System
or	O
Wayland	B-Language
)	O
,	O
Windows	O
(	O
Desktop	O
,	O
CE	O
and	O
Phone	O
8	O
)	O
,	O
macOS	B-Application
,	O
iOS	B-Application
,	O
Android	O
,	O
BlackBerry	O
10	O
and	O
embedded	O
Linux	O
;	O
used	O
in	O
the	O
KDE	B-Application
,	O
Trinity	O
,	O
LXQt	B-Language
,	O
and	O
Lumina	B-Application
desktop	I-Application
environment	I-Application
,	O
it	O
's	O
also	O
used	O
in	O
Ubuntu	O
's	O
Unity	B-Device
shell	I-Device
.	O
</s>
<s>
Rogue	O
Wave	O
Views	O
(	O
formerly	O
ILOG	O
Views	O
)	O
provides	O
GUI	B-Application
and	O
graphic	O
library	O
for	O
Windows	O
and	O
the	O
main	O
X11	B-Operating_System
platforms	O
.	O
</s>
<s>
TnFOX	B-Language
,	O
open	O
source	O
(	O
LGPL	B-Application
)	O
,	O
a	O
portability	O
toolkit	O
.	O
</s>
<s>
The	O
Visual	B-Library
Component	I-Library
Framework	I-Library
(	O
VCF	B-Library
)	O
is	O
an	O
open	O
source	O
(	O
BSD	B-Operating_System
license	I-Operating_System
)	O
C++	B-Language
framework	O
project	O
.	O
</s>
<s>
wxWidgets	B-Language
(	O
formerly	O
wxWindows	B-Language
)	O
,	O
open	O
source	O
(	O
relaxed	O
LGPL	B-Application
)	O
,	O
abstracts	O
toolkits	O
across	O
several	O
platforms	O
for	O
C++	B-Language
,	O
Python	B-Language
,	O
Perl	B-Language
,	O
Ruby	B-Language
and	O
Haskell	B-Language
.	O
</s>
<s>
Zinc	B-Library
Application	I-Library
Framework	I-Library
,	O
cross-platform	O
widget	B-Library
toolkit	I-Library
.	O
</s>
<s>
Tkinter	B-Language
,	O
open	O
source	O
(	O
BSD	B-Operating_System
)	O
is	O
a	O
Python	B-Language
binding	O
to	O
the	O
Tk	B-Application
GUI	B-Library
toolkit	I-Library
.	O
</s>
<s>
Tkinter	B-Language
is	O
included	O
with	O
standard	O
GNU/Linux	O
,	O
Microsoft	B-Application
Windows	I-Application
and	O
macOS	B-Application
installs	O
of	O
Python	B-Language
.	O
</s>
<s>
Kivy	B-Language
,	O
open	O
source	O
(	O
MIT	B-License
)	O
is	O
a	O
modern	O
library	O
for	O
rapid	O
development	O
of	O
applications	O
that	O
make	O
use	O
of	O
innovative	O
user	O
interfaces	O
,	O
such	O
as	O
multi-touch	O
apps	O
.	O
</s>
<s>
Fully	O
written	O
in	O
Python	B-Language
with	O
additional	O
speed	O
ups	O
in	O
Cython	B-Application
.	O
</s>
<s>
PySide	B-Language
,	O
open	O
source	O
(	O
LGPL	B-Application
)	O
is	O
a	O
Python	B-Language
binding	O
of	O
the	O
cross-platform	O
GUI	B-Library
toolkit	I-Library
Qt	B-Language
developed	O
by	O
The	O
Qt	B-Language
Company	O
,	O
as	O
part	O
of	O
the	O
Qt	B-Language
for	O
Python	B-Language
project	O
.	O
</s>
<s>
PyQt	B-Language
,	O
open	O
source	O
(	O
GPL	B-License
and	O
commercial	O
)	O
is	O
another	O
Python	B-Language
binding	O
of	O
the	O
cross-platform	O
GUI	B-Library
toolkit	I-Library
Qt	B-Language
developed	O
by	O
Riverbank	O
Computing	O
.	O
</s>
<s>
PyGTK	B-Language
,	O
open	O
source	O
(	O
LGPL	B-Application
)	O
is	O
a	O
set	O
of	O
Python	B-Language
wrappers	O
for	O
the	O
GTK	B-Application
graphical	B-Application
user	I-Application
interface	I-Application
library	O
.	O
</s>
<s>
wxPython	B-Language
,	O
open	O
source	O
(	O
wxWindows	B-Language
License	O
)	O
is	O
a	O
wrapper	O
for	O
the	O
cross-platform	O
GUI	B-Application
API	B-General_Concept
wxWidgets	B-Language
for	O
the	O
Python	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
Pyjs	B-Language
,	O
open	O
source	O
(	O
Apache	B-Application
License	I-Application
2.0	O
)	O
is	O
a	O
rich	B-Application
web	I-Application
application	I-Application
framework	O
for	O
developing	O
client-side	O
web	O
and	O
desktop	O
applications	O
,	O
it	O
is	O
a	O
port	O
of	O
Google	B-Language
Web	I-Language
Toolkit	I-Language
(	O
GWT	O
)	O
from	O
Java	B-Language
.	O
</s>
<s>
Clutter	B-Language
(	O
LGPL	B-Application
)	O
(	O
in	O
C	B-Language
)	O
is	O
an	O
open	O
source	O
software	O
library	O
for	O
creating	O
fast	O
,	O
visually	O
rich	O
and	O
animated	O
graphical	B-Application
user	I-Application
interfaces	I-Application
.	O
</s>
<s>
Adobe	B-Operating_System
Flash	I-Operating_System
allows	O
creating	O
widgets	O
running	O
in	O
most	O
web	O
browsers	O
and	O
in	O
several	O
mobile	O
phones	O
.	O
</s>
<s>
Adobe	B-Operating_System
Flex	I-Operating_System
provides	O
high-level	O
widgets	O
for	O
building	O
web	O
user	O
interfaces	O
.	O
</s>
<s>
Flash	B-Operating_System
widgets	O
can	O
be	O
used	O
in	O
Flex	O
.	O
</s>
<s>
Flash	B-Operating_System
and	O
Flex	O
widgets	O
will	O
run	O
without	O
a	O
web	O
browser	O
in	O
the	O
Adobe	B-Operating_System
AIR	I-Operating_System
runtime	O
environment	O
.	O
</s>
<s>
Fyne	B-Library
,	O
open	O
source	O
(	O
BSD	B-Operating_System
)	O
is	O
inspired	O
by	O
the	O
principles	O
of	O
Material	O
Design	O
to	O
create	O
applications	O
that	O
look	O
and	O
behave	O
consistently	O
across	O
Windows	O
,	O
macOS	B-Application
,	O
Linux	O
,	O
BSD	B-Operating_System
,	O
Android	O
and	O
iOS	B-Application
.	O
</s>
<s>
YUI	B-Language
(	O
Yahoo	O
!	O
</s>
<s>
Gtk#	O
,	O
C#	B-Application
wrappers	O
around	O
the	O
underlying	O
GTK	B-Application
and	O
GNOME	B-Application
libraries	O
,	O
written	O
in	O
C	B-Language
and	O
available	O
on	O
Linux	O
,	O
MacOS	B-Application
and	O
Windows	O
.	O
</s>
<s>
QtSharp	O
,	O
C#	B-Application
wrappers	O
around	O
the	O
Qt	B-Language
widget	B-Library
toolkit	I-Library
,	O
which	O
is	O
itself	O
based-on	O
the	O
C++	B-Language
language	I-Language
.	O
</s>
<s>
Windows	B-Application
Forms	I-Application
.	O
</s>
<s>
There	O
is	O
an	O
original	O
Microsoft	O
's	O
implementation	O
that	O
is	O
a	O
wrapper	O
around	O
the	O
Windows	B-Library
API	I-Library
and	O
runs	O
on	O
windows	O
,	O
and	O
Mono	B-Application
's	O
alternative	O
implementation	O
that	O
is	O
cross	O
platform	O
.	O
</s>
<s>
The	O
Abstract	B-Language
Window	I-Language
Toolkit	I-Language
(	O
AWT	B-Language
)	O
is	O
Sun	O
Microsystems	O
 '	O
original	O
widget	B-Library
toolkit	I-Library
for	O
Java	B-Language
applications	O
.	O
</s>
<s>
Swing	B-Language
is	O
a	O
richer	O
widget	B-Library
toolkit	I-Library
supported	O
since	O
J2SE	B-Language
1.2	O
as	O
a	O
replacement	O
for	O
AWT	B-Language
widgets	O
.	O
</s>
<s>
Swing	B-Language
is	O
a	O
lightweight	O
toolkit	O
,	O
meaning	O
it	O
does	O
not	O
rely	O
on	O
native	O
widgets	O
.	O
</s>
<s>
Apache	B-Application
Pivot	I-Application
is	O
an	O
open-source	O
platform	O
for	O
building	O
rich	B-Application
web	I-Application
applications	I-Application
in	O
Java	B-Language
or	O
any	O
JVM-compatible	O
language	O
,	O
and	O
relies	O
on	O
the	O
WTK	O
widget	B-Library
toolkit	I-Library
.	O
</s>
<s>
JavaFX	B-Application
and	O
FXML	B-Language
.	O
</s>
<s>
The	O
Standard	B-Application
Widget	I-Application
Toolkit	I-Application
(	O
SWT	B-Application
)	O
is	O
a	O
native	O
widget	B-Library
toolkit	I-Library
for	O
Java	B-Language
that	O
was	O
developed	O
as	O
part	O
of	O
the	O
Eclipse	B-Application
project	O
.	O
</s>
<s>
SWT	B-Application
uses	O
a	O
standard	O
toolkit	O
for	O
the	O
running	O
platform	O
(	O
such	O
as	O
the	O
Windows	B-Library
API	I-Library
,	O
OS	B-Operating_System
X	I-Operating_System
Cocoa	I-Operating_System
,	O
or	O
GTK	B-Application
)	O
underneath	O
.	O
</s>
<s>
Qt	B-Language
Jambi	I-Language
,	O
the	O
official	O
Java	B-Language
binding	O
to	O
Qt	B-Language
from	O
Trolltech	O
.	O
</s>
<s>
FireMonkey	B-Language
or	O
FMX	O
is	O
a	O
cross-platform	O
widget	O
and	O
graphics	O
library	O
distributed	O
with	O
Delphi	B-Language
and	O
C++Builder	B-Language
since	O
version	O
XE2	O
in	O
2011	O
.	O
</s>
<s>
It	O
has	O
bindings	B-Application
for	O
C++	B-Language
through	O
C++Builder	B-Language
,	O
and	O
supports	O
Windows	O
,	O
macOS	B-Application
,	O
iOS	B-Application
,	O
Android	O
,	O
and	O
most	O
recently	O
Linux	O
.	O
</s>
<s>
FireMonkey	B-Language
supports	O
both	O
platform-native	O
widgets	O
,	O
such	O
as	O
a	O
native	O
edit	O
control	O
,	O
as	O
well	O
as	O
custom	O
widgets	O
that	O
are	O
styled	O
to	O
look	O
native	O
on	O
the	O
target	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Its	O
graphics	O
are	O
GPU-accelerated	O
and	O
it	O
supports	O
styling	O
,	O
and	O
mixing	O
its	O
own	O
implementation	O
controls	O
with	O
native	O
system	O
controls	O
,	O
which	O
lets	O
apps	O
use	O
native	O
behaviour	O
where	O
it	O
's	O
important	O
(	O
for	O
example	O
,	O
for	O
IME	B-General_Concept
text	O
input	O
.	O
)	O
</s>
<s>
IP	B-Language
Pascal	I-Language
uses	O
a	O
graphics	O
library	O
built	O
on	O
top	O
of	O
standard	O
language	O
constructs	O
.	O
</s>
<s>
Lazarus	B-Language
LCL	B-Language
(	O
for	O
Pascal	B-Application
,	O
Object	B-Language
Pascal	I-Language
and	O
Delphi	B-Language
via	O
Free	B-Operating_System
Pascal	I-Operating_System
compiler	I-Operating_System
)	O
,	O
a	O
class	O
library	O
wrapping	O
GTK+	O
1.2	O
,	O
Gtk+	O
2.x	O
and	O
the	O
Windows	B-Library
API	I-Library
(	O
Carbon	B-Operating_System
,	O
Windows	O
CE	O
and	O
Qt4	B-Language
support	O
are	O
all	O
in	O
development	O
)	O
.	O
</s>
<s>
fpGUI	B-Language
is	O
created	O
with	O
the	O
Free	B-Operating_System
Pascal	I-Operating_System
compiler	I-Operating_System
.	O
</s>
<s>
It	O
does	O
n't	O
rely	O
on	O
any	O
large	O
3rdParty	O
libraries	O
and	O
currently	O
runs	O
on	O
Linux	O
,	O
Windows	O
,	O
Windows	O
CE	O
,	O
and	O
Mac	O
(	O
via	O
X11	B-Operating_System
)	O
.	O
</s>
<s>
A	O
Carbon	B-Operating_System
(	O
OS	O
X	B-Operating_System
)	O
port	O
is	O
underway	O
.	O
</s>
<s>
CLX	B-Language
(	O
Component	O
Library	O
for	O
Cross-platform	O
)	O
was	O
used	O
with	O
Borland	O
's	O
(	O
now	O
Embarcadero	O
's	O
)	O
Delphi	B-Language
,	O
C++	B-Language
Builder	I-Language
,	O
and	O
Kylix	B-Application
,	O
for	O
producing	O
cross-platform	O
applications	O
between	O
Windows	O
and	O
Linux	O
.	O
</s>
<s>
It	O
was	O
based	O
on	O
Qt	B-Language
,	O
wrapped	O
in	O
such	O
a	O
way	O
that	O
its	O
programming	B-Application
interface	I-Application
was	O
similar	O
to	O
that	O
of	O
the	O
VCL	B-Library
toolkit	O
.	O
</s>
<s>
It	O
is	O
no	O
longer	O
maintained	O
and	O
distributed	O
,	O
and	O
has	O
been	O
replaced	O
with	O
FireMonkey	B-Language
,	O
a	O
newer	O
toolkit	O
also	O
supporting	O
more	O
platforms	O
,	O
since	O
2011	O
.	O
</s>
<s>
Flutter	B-Application
(	O
software	O
)	O
is	O
an	O
open-source	O
and	O
cross	O
platform	O
framework	O
created	O
by	O
Google	O
.	O
</s>
<s>
Cocoa	B-Operating_System
Touch	I-Operating_System
is	O
a	O
framework	O
created	O
by	O
Apple	O
to	O
build	O
applications	O
for	O
iOS	B-Application
,	O
iPadOS	B-Operating_System
and	O
tvOS	B-Operating_System
.	O
</s>
<s>
Shoes	O
(	O
GUI	B-Library
toolkit	I-Library
)	O
is	O
a	O
cross	O
platform	O
framework	O
for	O
graphical	B-Application
user	I-Application
interface	I-Application
development	O
.	O
</s>
<s>
Toolkit	O
Initial	O
release	O
Latest	O
release	O
Main	O
language	B-Application
Bindings	I-Application
Tools	O
License	O
Pros	O
Cons	O
Back-endATL	O
,	O
WTL	B-Application
2004	O
C++	B-Language
Visual	O
Studio	O
not	O
portableAWT	O
1995	O
Java	B-Language
portableCEGUI	O
2004	O
C++Python	O
,	O
Lua	B-Language
(	O
using	O
tolua++	O
)	O
CEEDMIT	O
License	O
Free	O
license	O
,	O
fast	O
,	O
cross-platform	O
,	O
portable	O
,	O
free	O
GUI	B-Application
editing	O
toolClutter	O
2006	O
C	B-Language
Perl	B-Language
,	O
Python	B-Language
,	O
C#	B-Application
,	O
C++	B-Language
,	O
Vala	O
,	O
Ruby	B-Language
LGPLGTK	O
and	O
WebKit	B-Language
embeddingCLX	O
C++Elementary	O
2007	O
(	O
EFL	B-Library
:	O
2001	O
)	O
2016	O
C	B-Language
JavaScript	B-Language
,	O
Python	B-Language
,	O
Vala	O
,	O
C++	B-Language
editje	O
,	O
edjeLGPL	O
Portable	O
,	O
stable	O
,	O
fast	O
,	O
finger-friendly	O
FLTK	B-Language
1998	O
2019	O
C++	B-Language
Python	B-Language
(	O
pyFLTK	O
)	O
,	O
Perl	B-Language
(	O
FLTK.pm	O
)	O
,	O
Ruby	B-Language
(	O
Ruby/FLTK	O
)	O
,	O
Tcl	B-Operating_System
(	O
Tcl	B-Operating_System
Fltk	B-Language
)	O
,	O
Guile	O
(	O
guile-fltk	O
)	O
,	O
Eiffel	O
(	O
IFLTK	O
)	O
FLUID	O
(	O
Fast	O
Light	O
UI	O
Designer	O
)	O
LGPL	B-Application
(	O
with	O
an	O
exception	O
that	O
allows	O
static	B-Library
linking	I-Library
)	O
fast	O
,	O
small	O
enough	O
to	O
static	O
link	O
limited	O
widget	O
selection	O
Flutter	B-Application
2017	O
DartPortable	O
,	O
cross	O
platform	O
,	O
free	O
license	O
,	O
rich	O
widget	O
setFOX	O
1997	O
C++	B-Language
Ruby	B-Language
(	O
FXRuby	O
)	O
,	O
Python	B-Language
(	O
FXPy	O
)	O
,	O
Eiffel	O
(	O
EiffelFox	O
)	O
consistent	O
across	O
platforms	O
non-native	O
look	O
and	O
feelFyne	O
2018	O
2020	O
(	O
1.3.2	O
)	O
Go	B-Application
BSD	B-Operating_System
consistent	O
across	O
platforms	O
,	O
no	O
runtime	O
dependency	O
requires	O
OpenGLGLUI	O
C++GNUstep	O
1994	O
2017	O
Objective-C	B-Language
Java	B-Language
,	O
Ruby	B-Language
,	O
SchemeGorm	O
(	O
computing	O
)	O
GPL	B-License
for	O
the	O
apps	O
,	O
LGPL	B-Application
for	O
the	O
libs	O
Portable	O
,	O
free	O
license	O
Native	O
on	O
macOS	B-Application
(	O
with	O
Cocoa	B-Operating_System
)	O
X11	B-Operating_System
,	O
Win32	B-Library
,	O
WaylandGTK	O
1997	O
C	B-Language
C++	B-Language
(	O
gtkmm	B-Language
)	O
,	O
Perl	B-Language
(	O
Gtk2-perl	B-Language
)	O
,	O
Ruby	B-Language
(	O
ruby-gtk2	O
)	O
,	O
Python	B-Language
(	O
PyGTK	B-Language
)	O
,	O
Haskell	B-Language
(	O
Gtk2Hs	O
)	O
,	O
Java	B-Language
(	O
java-gnome	B-Language
)	O
(	O
not	O
available	O
for	O
Microsoft	B-Application
Windows	I-Application
)	O
,	O
C#	B-Application
(	O
Gtk#	O
)	O
,	O
PHP	O
(	O
PHP-GTK	B-Language
)	O
,	O
Ada	O
(	O
GTKAda	O
)	O
,	O
D	O
(	O
gtkD	B-Application
)	O
,	O
FreeBasic	O
(	O
GladeToBac	O
)	O
,	O
Go	B-Application
(	O
go-gtk	O
)	O
,	O
OCaml	O
(	O
lablgtk	O
)	O
,	O
JavaScript	B-Language
(	O
Gjs	B-Language
,	O
Seed	O
(	O
programming	O
)	O
)	O
,	O
Fortran	O
(	O
gtk-fortran	O
)	O
,	O
Lua	B-Language
(	O
lua-lgi	O
)	O
,	O
R	O
(	O
RGtk2	B-Language
)	O
and	O
others	O
via	O
GTK-serverGlade	O
,	O
GNOME	B-Application
BuilderLGPL	O
Portable	O
,	O
free	O
license	O
Partly	O
native	O
only.Migrating	O
to	O
client-side	O
windows	O
:	O
"	O
GDK	O
looks	O
for	O
the	O
GDK_NATIVE_WINDOWS	O
environment	O
variable	O
and	O
makes	O
all	O
windows	O
native	O
if	O
it	O
is	O
set	O
.	O
</s>
<s>
"	O
Coding	O
Horror	O
:	O
Non-Native	O
UI	O
Sucks	O
:	O
"[…]	O
has	O
a	O
cross-platform	O
UI	O
based	O
on	O
GTK	B-Application
,	O
which	O
produces	O
predictably	O
bland	O
,	O
least-common-denominator	O
results	O
:	O
"	O
IUP	B-Language
1992	O
2019	O
C	B-Language
Lua	B-Language
(	O
IupLua	O
)	O
LEDC	O
:	O
a	O
compiler	O
for	O
LEDMIT	O
Portable	O
,	O
lightweight	O
,	O
use	O
the	O
native	O
API	B-General_Concept
,	O
native	O
look&feel	O
,	O
free	O
licence	O
Non‑Unicode	O
(	O
only	O
plain	O
ASCII	O
)	O
Comparing	O
IUP	B-Language
with	O
Other	O
Interface	O
Toolkits	O
:	O
"[…]	O
it	O
does	O
not	O
have	O
support	O
for	O
Unicode	O
characters	O
.	O
</s>
<s>
"	O
Juce	B-Language
2004	O
C++	B-Language
JucerGPL	O
,	O
commercial	O
Cross-platform	O
,	O
with	O
additional	O
audio	O
plug-in	O
wrapping	O
tools	O
(	O
VST	B-Application
,	O
RTAS	B-Operating_System
,	O
AAX	O
etc	O
.	O
</s>
<s>
)	O
MFC	B-Language
,	O
WinAPI	B-Library
1992	O
C++	B-Language
Visual	O
Studio	O
not	O
portable	O
(	O
but	O
Wine	B-Application
implements	O
it	O
for	O
X	B-Operating_System
Window	I-Operating_System
)	O
Motif	B-Application
,	O
Lesstif	B-Application
1980s	O
C	B-Language
BX	O
ProNana	O
C++	B-Language
2007	O
C++	B-Language
VisualStudio	O
,	O
Dev-C	O
++	O
,	O
Code::Blocks	O
,	O
GCC	O
portable	O
,	O
lightweight	O
,	O
modern	O
C++	B-Language
styleQt	O
1991	O
C++	B-Language
Ruby	B-Language
(	O
QtRuby	B-Language
)	O
,	O
Python	B-Language
(	O
PyQt	B-Language
,	O
PySide	B-Language
,	O
PythonQt	O
)	O
,	O
Ada	O
(	O
QtAda	O
)	O
,	O
c#	B-Application
(	O
Qyoto	O
)	O
,	O
Java	B-Language
(	O
Qt	B-Language
Jambi	I-Language
)	O
,	O
Pascal	B-Application
(	O
FreePascal	B-Operating_System
Qt4	B-Language
)	O
,	O
Perl	B-Language
(	O
Perl	B-Language
Qt4	B-Language
)	O
,	O
PHP(PHP-Qt )	O
,	O
Haskell	B-Language
(	O
Qt	B-Language
Haskell	B-Language
)	O
,	O
Lua	B-Language
(	O
lqt	O
,	O
QtLua	O
)	O
,	O
Dao	O
(	O
DaoQt	O
)	O
,	O
Tcl	B-Operating_System
(	O
qtcl	O
)	O
,	O
Common	O
Lisp	O
(	O
CommonQt	O
)	O
,	O
D	O
(	O
QtD	O
)	O
,	O
Harbour	O
(	O
hbqt	O
)	O
Qt	B-Language
Designer	I-Language
,	O
Qt	B-Language
CreatorGPL	O
,	O
LGPL	B-Application
.	O
</s>
<s>
Portable	O
,	O
rich	O
widget	B-Library
set	I-Library
,	O
GUI	B-Application
builder	O
,	O
free	O
license	O
,	O
stable	O
API	B-General_Concept
Partially	O
native	O
only.WxWidgets	O
Compared	O
To	O
Other	O
Toolkits	O
:	O
"	O
Qt	B-Language
does	O
n't	O
have	O
true	O
native	O
ports	O
like	O
wxWidgets	B-Language
does	O
.	O
</s>
<s>
Qt	B-Language
does	O
not	O
use	O
system	O
provided	O
widgets	O
,	O
but	O
emulates	O
it	O
with	O
themes	O
.	O
</s>
<s>
What	O
we	O
mean	O
by	O
this	O
is	O
that	O
even	O
though	O
Qt	B-Language
draws	O
them	O
quite	O
realistically	O
,	O
Qt	B-Language
draws	O
its	O
own	O
widgets	O
on	O
each	O
platform	O
.	O
</s>
<s>
"	O
Rogue	O
Wave	O
Views	O
1993	O
2014	O
(	O
5.8	O
)	O
C++	B-Language
ivfstudio	O
proprietary	O
portable	O
(	O
Windows	O
,	O
Unix-like	O
)	O
,	O
good	O
support	O
commercialShoes	O
(	O
GUI	B-Library
toolkit	I-Library
)	O
2007	O
2010Ruby	O
MIT	O
license/Open	O
source	O
Simplicity	O
,	O
ease	O
of	O
useSwing	O
1996	O
Java	B-Application
Eclipse	I-Application
,	O
NetBeansGPL	O
for	O
OpenJDK	B-Language
Portable	O
(	O
Java	B-Language
)	O
,	O
advanced	O
widgets	O
,	O
GUI	B-Application
buildersJavaFX	O
2008	O
2022	O
Java	B-Language
NetBeans	O
,	O
Scene	O
Builder	O
GPL	B-License
SWT	B-Application
Java	B-Language
D	O
(	O
DWT	B-Application
)	O
Eclipse	B-Application
portableTk	O
1991	O
2015	O
C	B-Language
,	O
Tcl	B-Operating_System
Ruby	B-Language
(	O
RubyTk	O
)	O
,	O
Python	B-Language
(	O
Tkinter	B-Language
)	O
,	O
Perl	B-Language
(	O
Perl/Tk	O
)	O
,	O
Ada	O
(	O
TASH	O
)	O
,	O
Common	O
Lisp	O
(	O
LTk	O
)	O
,	O
Erlang	O
(	O
etk	O
)	O
,	O
...	O
|BSD	O
very	O
portable	O
,	O
many	O
language	B-Application
bindings	I-Application
Ultimate++	B-Language
2004	O
2022	O
C++	B-Language
theIDEBSD	O
portable	O
,	O
NTL	O
,	O
free	O
licenseVCF	O
C++	B-Language
BSD	B-Operating_System
free	O
licenseVCL	O
DelphiWindows	O
Forms	O
CLI	B-Language
languages	I-Language
CLI	B-Language
languages	I-Language
Expression	O
,	O
Visual	O
Studio	O
portability	O
issues	O
,	O
no	O
MVCWPF	O
,	O
XAML	B-Device
,	O
Silverlight	B-Application
2007	O
CLI	B-Language
languages	I-Language
CLI	B-Language
languages	I-Language
Expression	O
,	O
Visual	O
Studio	O
Portability	O
issueswxWidgets	O
1992	O
C++	B-Language
C++	B-Language
(	O
native	O
)	O
,	O
Ruby	B-Language
(	O
wxRuby	O
)	O
,	O
Python	B-Language
(	O
wxPython	B-Language
)	O
,	O
Perl	B-Language
(	O
wxPerl	B-Language
)	O
,	O
Java	B-Language
(	O
wxJava	O
,	O
jwx	O
!	O
</s>
<s>
)	O
,	O
Lua	B-Language
(	O
wxLua	O
)	O
,	O
Tcl(wxTCL )	O
,	O
JavaScript	B-Language
(	O
GLUEscript	B-Language
)	O
,	O
Smalltalk	O
(	O
wxSqueak	O
)	O
,	O
Erlang	O
(	O
wxErlang	O
)	O
,	O
Haskell	B-Language
(	O
wxHaskell	B-Language
)	O
,	O
C	B-Language
(	O
wxC	O
)	O
,	O
D	O
(	O
wxD	O
)	O
,	O
.NET	B-Application
Framework	I-Application
(	O
wxNet	O
)	O
,	O
Common	O
Lisp	O
(	O
wxCL	O
)	O
,	O
Basic	O
(	O
wxBasic	B-Language
)	O
,	O
BlitzMax	O
(	O
wxMax	O
)	O
,	O
Euphoria	O
(	O
wxEuphoria	O
)	O
,	O
Ada	O
(	O
wxAda	O
)	O
,	O
Pike	O
(	O
wxPike	O
)	O
VisualWx	O
,	O
Boa	O
Constructor	O
,	O
PythonCard	O
,	O
Spe	O
,	O
XRCed	O
,	O
wxGlade	O
,	O
wxFormBuilder	B-Language
,	O
DialogBlocks	O
( $	O
)	O
,	O
wxDesigner	O
( $	O
)	O
wxWindows	B-Language
License	O
Portable	O
,	O
rich	O
widget	B-Library
set	I-Library
,	O
free	O
licence	O
,	O
semantic	O
similarities	O
to	O
MFC	B-Language
make	O
migration	O
easy	O
.	O
</s>
