<s>
This	O
is	O
a	O
list	O
of	O
notable	O
software	B-Application
forks	I-Application
.	O
</s>
<s>
The	O
many	O
varieties	O
of	O
proprietary	B-Application
Unix	B-Application
in	O
the	O
1980s	O
and	O
1990s	O
—	O
almost	O
all	O
derived	O
from	O
AT&T	O
Unix	B-Application
under	O
licence	O
and	O
all	O
called	O
"	O
Unix	B-Application
"	O
,	O
but	O
increasingly	O
mutually	O
incompatible	O
.	O
</s>
<s>
See	O
UNIX	B-Application
wars	O
.	O
</s>
<s>
Most	O
Linux	B-Application
distributions	I-Application
are	O
descended	O
from	O
other	O
distributions	O
,	O
most	O
being	O
traceable	O
back	O
to	O
Debian	O
,	O
Red	O
Hat	O
or	O
Softlanding	B-Operating_System
Linux	I-Operating_System
System	I-Operating_System
(	O
see	O
image	O
right	O
)	O
.	O
</s>
<s>
Merges	O
(	O
e.g.	O
,	O
United	B-Application
Linux	I-Application
or	O
Mandriva	O
)	O
are	O
rare	O
.	O
</s>
<s>
Pretty	B-Application
Good	I-Application
Privacy	I-Application
,	O
forked	O
outside	O
of	O
the	O
United	O
States	O
to	O
free	O
it	O
from	O
restrictive	O
US	O
laws	O
on	O
the	O
exportation	O
of	O
cryptographic	O
software	O
.	O
</s>
<s>
The	O
game	O
NetHack	B-Application
has	O
spawned	O
a	O
number	O
of	O
variants	O
using	O
the	O
original	O
code	O
,	O
notably	O
Slash'EM	B-Application
(	O
1997	O
)	O
,	O
and	O
was	O
itself	O
a	O
fork	B-Application
(	O
1987	O
)	O
of	O
Hack	B-Application
.	O
</s>
<s>
Openswan	B-Protocol
and	O
strongSwan	B-Protocol
,	O
from	O
the	O
discontinued	O
FreeS/WAN	B-Protocol
.	O
</s>
<s>
Symbolics	O
Lisp	B-Operating_System
Machine	I-Operating_System
operating	B-General_Concept
system	I-General_Concept
,	O
later	O
called	O
Symbolics	B-Application
Genera	I-Application
.	O
</s>
<s>
Forked	O
from	O
the	O
MIT	O
Lisp	B-Operating_System
Machine	I-Operating_System
operating	B-General_Concept
system	I-General_Concept
,	O
which	O
was	O
licensed	O
by	O
MIT	O
to	O
Symbolics	O
in	O
1980	O
.	O
</s>
<s>
This	O
fork	B-Application
later	O
motivated	O
Richard	O
Stallman	O
to	O
start	O
the	B-Application
GNU	I-Application
Project	I-Application
.	O
</s>
<s>
POSTGRES	B-Application
(	O
later	O
PostgreSQL	B-Application
)	O
,	O
after	O
Ingres	B-Application
branched	O
off	O
as	O
a	O
proprietary	B-Application
project	O
.	O
</s>
<s>
Microsoft	B-Application
SQL	I-Application
Server	I-Application
,	O
from	O
Sybase	B-Application
SQL	I-Application
Server	I-Application
,	O
via	O
a	O
technology-sharing	O
agreement	O
concerning	O
the	O
Tabular	B-Protocol
Data	I-Protocol
Stream	I-Protocol
protocol	O
.	O
</s>
<s>
SWLPC	O
,	O
from	O
LPMud	B-Application
.	O
</s>
<s>
Xemacs	B-Language
,	O
from	O
GNU	O
Emacs	B-Application
,	O
originally	O
for	O
Lucid	O
Corporation	O
internal	O
needs	O
.	O
</s>
<s>
FreeBSD	B-Operating_System
,	O
started	O
as	O
a	O
patchkit	O
to	O
386BSD	B-Operating_System
.	O
</s>
<s>
NetBSD	B-Device
,	O
started	O
as	O
a	O
patchkit	O
to	O
386BSD	B-Operating_System
.	O
</s>
<s>
Apache	B-Application
HTTP	I-Application
Server	I-Application
,	O
from	O
the	O
moribund	O
NCSA	B-Application
HTTPd	I-Application
.	O
</s>
<s>
OpenBSD	B-Operating_System
,	O
a	O
fork	B-Application
of	O
NetBSD	B-Device
1.0	O
by	O
Theo	O
de	O
Raadt	O
due	O
to	O
internal	O
developer	O
personality	O
clashes	O
.	O
</s>
<s>
EGCS	O
was	O
a	O
fork	B-Application
of	O
GCC	B-Application
,	O
later	O
named	O
as	O
the	O
official	O
version	O
.	O
</s>
<s>
Grace	B-Application
,	O
from	O
Xmgr	B-Application
,	O
after	O
that	O
project	O
ceased	O
development	O
.	O
</s>
<s>
FilmGIMP	O
,	O
later	O
called	O
CinePaint	B-Application
,	O
from	O
GIMP	B-Application
,	O
to	O
handle	O
48-bit	O
colour	O
.	O
</s>
<s>
OSSH	O
from	O
SSH	B-Protocol
,	O
when	O
that	O
project	O
was	O
proprietised	O
.	O
</s>
<s>
OpenSSH	B-Language
,	O
from	O
OSSH	O
.	O
</s>
<s>
Sodipodi	B-Language
,	O
from	O
Gill	B-Language
.	O
</s>
<s>
Steel	B-Language
Bank	I-Language
Common	I-Language
Lisp	I-Language
,	O
from	O
CMU	B-Language
Common	I-Language
Lisp	I-Language
.	O
</s>
<s>
TrueCrypt	B-Application
,	O
from	O
E4M	B-Application
when	O
the	O
latter	O
was	O
discontinued	O
.	O
</s>
<s>
Tux	B-Application
Racer	I-Application
went	O
proprietary	B-Application
in	O
2000	O
,	O
leading	O
to	O
several	O
forks	B-Application
including	O
OpenRacer	O
,	O
PlanetPenguin	B-Application
Racer	I-Application
and	O
Extreme	O
Tux	B-Application
Racer	I-Application
.	O
</s>
<s>
OpenOffice.org,	O
from	O
StarOffice	B-Application
after	O
Sun	O
Microsystems	O
made	O
the	O
source	O
code	O
publicly	O
available	O
.	O
</s>
<s>
OpenOffice.org	B-Application
was	O
eventually	O
forked	O
into	O
LibreOffice	B-Application
.	O
</s>
<s>
ELinks	B-Protocol
,	O
began	O
as	O
an	O
experimental	O
fork	B-Application
of	O
Links	B-Application
.	O
</s>
<s>
Fluxbox	B-Language
,	O
from	O
Blackbox	B-Device
.	O
</s>
<s>
GNU	B-Application
Radio	I-Application
,	O
from	O
pSpectra	O
.	O
</s>
<s>
Xvid	B-Algorithm
,	O
was	O
a	O
fork	B-Application
of	O
OpenDivX	B-Algorithm
.	O
</s>
<s>
WebKit	B-Language
,	O
project	O
was	O
started	O
within	O
Apple	O
by	O
Don	O
Melton	O
on	O
25	O
June	O
2001	O
as	O
a	O
fork	B-Application
of	O
KHTML	B-Language
.	O
</s>
<s>
GForge	B-Protocol
,	O
from	O
SourceForge	B-Application
.	O
</s>
<s>
GraphicsMagick	B-Application
,	O
from	O
ImageMagick	B-Language
due	O
to	O
concerns	O
over	O
the	O
openness	O
of	O
development	O
.	O
</s>
<s>
MirOS	B-Application
BSD	I-Application
,	O
from	O
OpenBSD	B-Operating_System
.	O
</s>
<s>
Syllable	B-Application
Desktop	I-Application
,	O
from	O
the	O
stagnant	O
AtheOS	B-Application
.	O
</s>
<s>
aMule	B-Language
,	O
from	O
xMule	B-Language
,	O
which	O
itself	O
forked	O
from	O
lMule	B-Language
shortly	O
before	O
,	O
over	O
developer	O
disagreements	O
.	O
</s>
<s>
b2evolution	B-Protocol
,	O
from	O
b2/CafeLog	B-Application
.	O
</s>
<s>
DragonFly	B-Application
BSD	I-Application
,	O
from	O
FreeBSD	B-Operating_System
4.8	O
by	O
long-time	O
FreeBSD	B-Operating_System
developer	O
Matt	O
Dillon	O
,	O
due	O
to	O
disagreement	O
over	O
FreeBSD	B-Operating_System
5	O
's	O
technical	O
direction	O
.	O
</s>
<s>
Epiphany	B-Language
,	O
from	O
Galeon	B-Language
,	O
after	O
developer	O
disagreements	O
about	O
Galeon	B-Language
's	O
growing	O
complexity	O
.	O
</s>
<s>
Inkscape	B-Application
(	O
vector-graphics	O
program	O
)	O
,	O
from	O
Sodipodi	B-Language
.	O
</s>
<s>
NeoOffice	B-Application
,	O
a	O
fork	B-Application
of	O
OpenOffice.org,	O
with	O
an	O
incompatible	O
license	O
(	O
GPL	O
rather	O
than	O
LGPL	O
)	O
,	O
due	O
to	O
disagreements	O
about	O
licensing	O
and	O
about	O
the	O
best	O
method	O
to	O
port	O
OpenOffice.org	B-Application
to	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
The	O
Safari	B-Application
renderer	O
that	O
became	O
WebKit	B-Language
,	O
from	O
KHTML	B-Language
.	O
</s>
<s>
sK1	B-Language
,	O
from	O
Skencil	B-Language
when	O
the	O
latter	O
moved	O
from	O
Tk	B-Application
to	O
GTK+	B-Application
.	O
</s>
<s>
WordPress	B-Application
,	O
from	O
b2/CafeLog	B-Application
.	O
</s>
<s>
Zen	B-Language
Cart	I-Language
,	O
from	O
osCommerce	B-Language
.	O
</s>
<s>
Baz	O
,	O
the	O
previous	O
version	O
of	O
Bazaar	B-Protocol
,	O
from	O
GNU	B-Protocol
arch	I-Protocol
.	O
</s>
<s>
FrostWire	B-Protocol
,	O
from	O
LimeWire	B-Application
after	O
LimeWire	B-Application
's	O
developers	O
considered	O
adding	O
RIAA-sponsored	O
blocking	O
code	O
.	O
</s>
<s>
MediaPortal	B-Application
,	O
from	O
XBMC	B-Application
.	O
</s>
<s>
WineX	B-General_Concept
(	O
later	O
Cedega	B-General_Concept
)	O
,	O
was	O
a	O
proprietary	B-Application
fork	B-Application
of	O
Wine	B-Application
.	O
</s>
<s>
XOrg	B-Operating_System
,	O
from	O
XFree86	B-Device
,	O
in	O
order	O
to	O
adopt	O
a	O
more	O
open	O
development	O
model	O
and	O
due	O
to	O
concerns	O
over	O
the	O
latter	O
's	O
change	O
to	O
a	O
license	O
many	O
distributors	O
found	O
unacceptable	O
.	O
</s>
<s>
Audacious	B-Language
,	O
from	O
Beep	O
Media	O
Player	O
to	O
continue	O
work	O
on	O
the	O
old	O
version	O
of	O
that	O
project	O
.	O
</s>
<s>
Joomla	B-Protocol
,	O
from	O
Mambo	B-Language
due	O
to	O
concerns	O
over	O
project	O
structure	O
.	O
</s>
<s>
Claws	B-Language
Mail	I-Language
,	O
from	O
Sylpheed	B-Language
,	O
due	O
to	O
perceived	O
slowness	O
in	O
accepting	O
enhancements	O
.	O
</s>
<s>
Adempiere	B-Language
,	O
a	O
community	O
maintained	O
fork	B-Application
of	O
Compiere	B-Application
2.5.3b	O
,	O
due	O
to	O
disagreement	O
with	O
commercial	O
and	O
technical	O
direction	O
of	O
Compiere	B-Application
Inc	O
.	O
</s>
<s>
Cdrkit	B-Application
,	O
from	O
Cdrtools	B-Language
due	O
to	O
perceived	O
licensing	O
issues	O
.	O
</s>
<s>
LedgerSMB	B-Application
,	O
from	O
SQL-Ledger	B-Language
,	O
due	O
to	O
disagreements	O
over	O
handling	O
of	O
security	O
issues	O
.	O
</s>
<s>
MindTouch	O
,	O
a	O
fork	B-Application
of	O
MediaWiki	B-Application
.	O
</s>
<s>
MPC-HC	B-Language
,	O
a	O
fork	B-Application
of	O
Media	B-Language
Player	I-Language
Classic	I-Language
.	O
</s>
<s>
Batavi	B-Application
,	O
from	O
osCommerce	B-Language
,	O
due	O
to	O
that	O
project	O
's	O
slow	O
release	O
schedule	O
.	O
</s>
<s>
Go-oo	B-Language
,	O
from	O
OpenOffice.org,	O
due	O
to	O
that	O
project	O
's	O
contributor	O
licensing	O
agreement	O
.	O
</s>
<s>
Boxee	B-Device
,	O
a	O
proprietary	B-Application
fork	B-Application
of	O
XBMC	B-Application
.	O
</s>
<s>
Dreamwidth	B-Protocol
,	O
from	O
LiveJournal	B-Application
by	O
ex-LiveJournal	O
developers	O
.	O
</s>
<s>
Drizzle	B-Application
,	O
was	O
intended	O
as	O
a	O
slimmed-down	O
and	O
faster	O
fork	B-Application
of	O
MySQL	B-Application
.	O
</s>
<s>
MiaCMS	O
,	O
from	O
Mambo	B-Language
.	O
</s>
<s>
Plex	B-Application
,	O
a	O
proprietary	B-Application
fork	B-Application
of	O
XBMC	B-Application
.	O
</s>
<s>
dbndns	B-Application
,	O
from	O
djbdns	B-Protocol
after	O
the	O
latter	O
was	O
released	O
into	O
the	O
public	O
domain	O
and	O
abandoned	O
.	O
</s>
<s>
Freeplane	B-Language
,	O
from	O
FreeMind	B-Language
.	O
</s>
<s>
FusionForge	B-Protocol
,	O
from	O
GForge	B-Protocol
when	O
GForge	B-Protocol
shifted	O
focus	O
to	O
its	O
proprietary	B-Application
version	O
.	O
</s>
<s>
Icinga	B-Protocol
,	O
from	O
Nagios	B-Application
,	O
due	O
to	O
perceived	O
slow	O
development	O
and	O
problems	O
dealing	O
with	O
Nagios	B-Application
LLC	O
.	O
</s>
<s>
kompoZer	B-General_Concept
,	O
from	O
Nvu	B-General_Concept
after	O
that	O
project	O
went	O
dormant	O
.	O
</s>
<s>
MariaDB	B-Application
,	O
from	O
MySQL	B-Application
,	O
over	O
concern	O
as	O
to	O
Sun	O
Microsystems	O
 '	O
plans	O
for	O
the	O
latter	O
.	O
</s>
<s>
Pale	B-Protocol
Moon	I-Protocol
,	O
from	O
Firefox	B-Application
.	O
</s>
<s>
Qt	B-Language
Extended	I-Language
Improved	O
,	O
from	O
Qtopia	B-Language
after	O
the	O
latter	O
was	O
discontinued	O
by	O
Qt	B-Language
Software	I-Language
.	O
</s>
<s>
Voddler	B-Application
,	O
is	O
a	O
proprietary	B-Application
fork	B-Application
of	O
XBMC	B-Application
and	O
FFmpeg	B-Library
.	O
</s>
<s>
Peppermint	O
Linux	O
OS	B-General_Concept
,	O
from	O
Lubuntu	B-Application
,	O
due	O
to	O
a	O
perceived	O
need	O
for	O
a	O
cloud-centric	O
derivative	O
of	O
the	O
Ubuntu	B-Operating_System
OS	I-Operating_System
.	O
</s>
<s>
Chamilo	B-Protocol
,	O
from	O
Dokeos	O
,	O
due	O
to	O
community	O
management	O
concerns	O
with	O
that	O
project	O
.	O
</s>
<s>
LibreOffice	B-Application
,	O
from	O
OpenOffice.org	B-Application
(	O
and	O
merging	O
Go-oo	B-Language
)	O
,	O
due	O
to	O
Oracle	B-Application
Corporation	I-Application
's	O
perceived	O
neglect	O
of	O
the	O
software	O
.	O
</s>
<s>
OpenIndiana	B-Application
,	O
from	O
OpenSolaris	B-Operating_System
after	O
Oracle	B-Application
Corporation	I-Application
discontinued	O
the	O
latter	O
.	O
</s>
<s>
Illumos	B-Application
,	O
from	O
the	O
OpenSolaris	B-Operating_System
kernel	O
OS/Net	B-Operating_System
,	O
after	O
Oracle	B-Application
closed	O
down	O
public	O
access	O
to	O
the	O
source	O
code	O
.	O
</s>
<s>
webtrees	B-Language
,	O
from	O
PhpGedView	B-Language
,	O
due	O
to	O
SourceForge	B-Application
's	O
policy	O
on	O
exporting	O
encryption	O
.	O
</s>
<s>
Xonotic	B-Application
,	O
from	O
Nexuiz	B-Application
,	O
after	O
that	O
project	O
was	O
taken	O
proprietary	B-Application
.	O
</s>
<s>
OpenAM	B-Language
,	O
from	O
OpenSSO	B-Language
after	O
Oracle	B-Application
Corporation	I-Application
discontinued	O
the	O
latter	O
.	O
</s>
<s>
Calligra	B-Application
,	O
from	O
KOffice	B-Language
after	O
developer	O
disagreements	O
.	O
</s>
<s>
Jenkins	B-Language
,	O
from	O
Hudson	B-Language
(	O
2011	O
)	O
,	O
due	O
to	O
Oracle	B-Application
Corporation	I-Application
's	O
perceived	O
neglect	O
of	O
the	O
project	O
's	O
infrastructure	O
and	O
disagreements	O
over	O
use	O
of	O
the	O
name	O
on	O
non-Oracle-maintained	O
infrastructure	O
.	O
</s>
<s>
Univa	B-Operating_System
Grid	I-Operating_System
Engine	I-Operating_System
,	O
from	O
Oracle	B-Operating_System
Grid	I-Operating_System
Engine	I-Operating_System
,	O
after	O
Oracle	B-Application
Corporation	I-Application
stopped	O
releasing	O
project	O
source	O
.	O
</s>
<s>
Mer	B-Application
,	O
started	O
as	O
a	O
fork	B-Application
of	O
MeeGo	B-Operating_System
.	O
</s>
<s>
libav	B-Language
,	O
a	O
fork	B-Application
of	O
ffmpeg	B-Library
.	O
</s>
<s>
WooCommerce	B-Language
,	O
a	O
fork	B-Application
of	O
Jigoshop	O
.	O
</s>
<s>
Blink	B-Language
,	O
a	O
fork	B-Application
of	O
WebKit	B-Language
.	O
</s>
<s>
SuiteCRM	B-Application
,	O
from	O
the	O
last	O
open	O
source	O
version	O
of	O
SugarCRM	B-Operating_System
.	O
</s>
<s>
LibreSSL	B-Language
,	O
from	O
OpenSSL	B-Language
.	O
</s>
<s>
Nokia	O
X	O
software	O
platform	O
,	O
a	O
fork	B-Application
of	O
the	O
Android	B-Application
Open	I-Application
Source	I-Application
Project	I-Application
developed	O
by	O
Nokia	O
exclusively	O
for	O
its	O
X	B-Device
family	I-Device
of	I-Device
Android	I-Device
smartphones	I-Device
.	O
</s>
<s>
io.js	O
from	O
node.js	B-Language
.	O
</s>
<s>
In	O
2015	O
it	O
was	O
blessed	O
as	O
the	O
official	O
version	O
of	O
node.js	B-Language
.	O
</s>
<s>
Basilisk	O
,	O
from	O
Firefox	B-Application
.	O
</s>
<s>
Bitcoin	B-Protocol
Cash	I-Protocol
,	O
from	O
Bitcoin	B-Language
Core	I-Language
,	O
supported	O
by	O
the	O
forked	O
implementations	O
Bitcoin	O
ABC	O
,	O
Bitcoin	B-Application
Unlimited	I-Application
and	O
Bitcoin	B-Protocol
XT	I-Protocol
.	O
</s>
<s>
Unified	O
XUL	B-Application
Platform	O
,	O
from	O
XUL	B-Application
.	O
</s>
<s>
White	O
Star	O
,	O
from	O
Pale	B-Protocol
Moon	I-Protocol
.	O
</s>
