<s>
Gobby	B-Protocol
is	O
a	O
free	B-Application
software	I-Application
collaborative	B-Application
real-time	I-Application
editor	I-Application
available	O
on	O
Windows	B-Application
and	O
Unix-like	B-Operating_System
platforms	O
.	O
</s>
<s>
(	O
It	O
runs	O
on	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
using	O
Apple	O
's	O
X11.app	B-Operating_System
.	O
)	O
</s>
<s>
It	O
was	O
initially	O
released	O
in	O
June	O
2005	O
by	O
the	O
0x539	O
dev	O
group	O
(	O
the	O
hexadecimal	O
value	O
0x539	O
is	O
equal	O
to	O
1337	B-Language
in	O
decimal	B-Application
)	O
.	O
</s>
<s>
Gobby	B-Protocol
uses	O
GTK+	B-Application
for	O
its	O
GUI	O
widgets	O
.	O
</s>
<s>
Gobby	B-Protocol
features	O
a	O
client-server	O
architecture	O
which	O
supports	O
multiple	O
documents	O
in	O
one	O
session	O
,	O
document	O
synchronisation	O
on	O
request	O
,	O
password	O
protection	O
and	O
an	O
IRC-like	O
chat	O
for	O
communication	O
out	O
of	O
band	O
.	O
</s>
<s>
Gobby	B-Protocol
is	O
fully	O
Unicode-aware	O
,	O
provides	O
syntax	O
highlighting	O
for	O
most	O
programming	O
languages	O
and	O
has	O
basic	O
Zeroconf	B-Application
support	O
.	O
</s>
<s>
Rudel	O
,	O
a	O
plugin	O
for	O
GNU	B-Application
Emacs	I-Application
)	O
.	O
</s>
<s>
Gobby	B-Protocol
0.5	O
replaces	O
Sobby	O
with	O
a	O
new	O
server	O
called	O
infinoted	O
.	O
</s>
<s>
Version	O
0.4.0	O
featured	O
fully	B-Application
encrypted	I-Application
connections	O
and	O
further	O
usability	O
enhancements	O
.	O
</s>
<s>
The	O
most	O
noticeable	O
improvement	O
is	O
undo	B-Application
support	O
,	O
using	O
the	O
adOPTed	O
algorithm	O
for	O
concurrency	O
control	O
.	O
</s>
