<s>
Cyberduck	B-Protocol
is	O
an	O
open-source	B-Application
client	O
for	O
FTP	B-Protocol
and	O
SFTP	B-Protocol
,	O
WebDAV	B-Protocol
,	O
and	O
cloud	B-Architecture
storage	O
(	O
OpenStack	B-Application
Swift	I-Application
,	O
Amazon	B-General_Concept
S3	I-General_Concept
,	O
Backblaze	B-General_Concept
B2	I-General_Concept
and	O
Microsoft	B-Application
Azure	I-Application
)	O
,	O
available	O
for	O
macOS	B-Application
and	O
Windows	O
(	O
as	O
of	O
version	O
4.0	O
)	O
licensed	O
under	O
the	O
GPL	B-License
.	O
</s>
<s>
Cyberduck	B-Protocol
is	O
written	O
in	O
Java	B-Language
and	O
C#	B-Application
using	O
the	O
Cocoa	B-Operating_System
user	B-Application
interface	I-Application
framework	O
on	O
macOS	B-Application
and	O
Windows	B-Application
Forms	I-Application
on	O
Windows	O
.	O
</s>
<s>
It	O
supports	O
FTP/TLS	B-Protocol
(	O
FTP	B-Protocol
secured	O
over	O
SSL/TLS	O
)	O
,	O
using	O
AUTH	O
TLS	O
as	O
well	O
as	O
directory	B-Application
synchronization	I-Application
.	O
</s>
<s>
The	O
user	O
interacts	O
with	O
the	O
user	B-Application
interface	I-Application
(	O
GUI	B-Application
)	O
,	O
including	O
file	O
transfer	O
by	O
drag	O
and	O
drop	O
and	O
notifications	O
via	O
Growl	B-Operating_System
.	O
</s>
<s>
It	O
is	O
also	O
able	O
to	O
open	O
some	O
files	O
in	O
external	O
text	B-Application
editors	I-Application
.	O
</s>
<s>
Cyberduck	B-Protocol
includes	O
a	O
bookmark	O
manager	O
and	O
supports	O
Apple	O
's	O
Keychain	B-Application
and	O
Bonjour	B-Application
networking	I-Application
.	O
</s>
<s>
The	O
Cyberduck	B-Protocol
creator	O
also	O
provides	O
a	O
version	O
for	O
the	O
command-line	B-Application
interface	I-Application
(	O
CLI	O
)	O
,	O
called	O
duck	O
,	O
available	O
for	O
Windows	O
,	O
macOS	B-Application
and	O
Linux	B-Application
.	O
</s>
<s>
The	O
program	O
can	O
be	O
used	O
as	O
FTP	B-Protocol
and	O
SFTP-client	O
,	O
for	O
operations	O
with	O
different	O
cloud	B-Architecture
services	I-Architecture
.	O
</s>
