<s>
In	O
Unix	B-Application
computing	O
,	O
Blackbox	B-Device
is	O
a	O
free	B-License
and	I-License
open-source	I-License
stacking	B-Device
window	I-Device
manager	I-Device
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
.	O
</s>
<s>
Blackbox	B-Device
has	O
specific	O
design	O
goals	O
,	O
and	O
some	O
functionality	O
is	O
provided	O
only	O
through	O
other	O
applications	O
.	O
</s>
<s>
Blackbox	B-Device
is	O
written	O
in	O
C++	B-Language
and	O
contains	O
completely	O
original	O
code	O
.	O
</s>
<s>
It	O
was	O
created	O
by	O
Bradley	B-Device
T	I-Device
.	I-Device
Hughes	I-Device
and	O
is	O
available	O
under	O
the	B-License
MIT	I-License
License	I-License
.	O
</s>
<s>
Blackbox	B-Device
has	O
compliance	O
with	O
the	O
Extended	B-Application
Window	I-Application
Manager	I-Application
Hints	I-Application
specification	O
.	O
</s>
<s>
However	O
an	O
actively	O
maintained	O
fork	O
by	O
Brian	O
Bidulock	O
has	O
been	O
picked	O
up	O
by	O
several	O
Linux	B-Application
distributions	O
in	O
its	O
place	O
,	O
and	O
it	O
is	O
featured	O
in	O
pkgsrc	B-Application
.	O
</s>
<s>
Despite	O
that	O
,	O
some	O
other	O
Linux	B-Application
distributions	O
still	O
use	O
the	O
original	O
source	O
code	O
,	O
as	O
does	O
FreeBSD	B-Operating_System
.	O
</s>
<s>
Features	O
of	O
the	O
Blackbox	B-Device
window	O
manager	O
include	O
:	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
other	O
window	O
manager	O
forks	O
of	O
Blackbox	B-Device
:	O
</s>
<s>
Although	O
they	O
do	O
not	O
share	O
the	O
same	O
codebase	O
,	O
these	O
projects	O
are	O
also	O
inspired	O
by	O
Blackbox	B-Device
.	O
</s>
