<s>
Ace	B-Language
(	O
from	O
Ajax.org	O
Cloud9	O
Editor	O
)	O
is	O
a	O
standalone	O
code	B-Application
editor	I-Application
written	O
in	O
JavaScript	B-Language
.	O
</s>
<s>
The	O
goal	O
is	O
to	O
create	O
a	O
web-based	O
code	B-Application
editor	I-Application
that	O
matches	O
and	O
extends	O
the	O
features	O
,	O
usability	O
,	O
and	O
performance	O
of	O
existing	O
native	O
editors	O
such	O
as	O
TextMate	B-Application
,	O
Vim	B-Application
,	O
or	O
Eclipse	B-Application
.	O
</s>
<s>
It	O
can	O
be	O
easily	O
embedded	O
in	O
any	O
web	O
page	O
and	O
JavaScript	B-Language
application	O
.	O
</s>
<s>
Ace	B-Language
is	O
developed	O
as	O
the	O
primary	O
editor	O
for	O
Cloud9	B-Application
IDE	I-Application
and	O
as	O
the	O
successor	O
of	O
the	O
Mozilla	B-Application
Skywriter	I-Application
project	O
.	O
</s>
<s>
Known	O
as	O
Ace	B-Language
(	O
Ajax.org	O
Cloud9	O
Editor	O
)	O
,	O
it	O
was	O
previously	O
known	O
as	O
Bespin	B-Application
then	O
later	O
Skywriter	B-Application
.	O
</s>
<s>
Bespin	B-Application
and	O
Ace	B-Language
started	O
as	O
two	O
independent	O
projects	O
both	O
aiming	O
to	O
build	O
a	O
no-compromise	O
code	B-Application
editor	I-Application
component	O
for	O
the	O
web	O
.	O
</s>
<s>
Bespin	B-Application
started	O
as	O
part	O
of	O
Mozilla	B-Operating_System
Labs	I-Operating_System
and	O
was	O
based	O
on	O
the	O
<canvas>	O
html	O
tag	O
,	O
while	O
Ace	B-Language
is	O
the	O
Editor	O
component	O
of	O
the	O
Cloud9	B-Application
IDE	I-Application
and	O
is	O
using	O
the	B-General_Concept
DOM	I-General_Concept
for	O
rendering	O
.	O
</s>
<s>
After	O
the	O
release	O
of	O
Ace	B-Language
at	O
JSConf.eu	O
2010	O
,	O
in	O
Berlin	O
,	O
the	O
Skywriter	B-Application
team	O
decided	O
to	O
merge	O
Ace	B-Language
with	O
a	O
simplified	O
version	O
of	O
Skywriter	B-Application
's	O
plugin	O
system	O
and	O
some	O
of	O
Skywriter	B-Application
's	O
extensibility	O
points	O
.	O
</s>
<s>
All	O
these	O
changes	O
were	O
merged	O
back	O
to	O
Ace	B-Language
,	O
which	O
supersedes	O
Skywriter	B-Application
.	O
</s>
<s>
Both	O
Ajax.org	O
and	O
Mozilla	B-Operating_System
are	O
actively	O
developing	O
and	O
maintaining	O
Ace	B-Language
.	O
</s>
