<s>
Xsnow	B-Application
is	O
a	O
software	B-Application
application	I-Application
that	O
creates	O
the	O
appearance	O
of	O
snow	O
falling	O
on	O
the	O
elements	O
of	O
the	O
graphical	B-Application
user	I-Application
interface	I-Application
of	O
a	O
computer	O
system	O
.	O
</s>
<s>
Xsnow	B-Application
was	O
originally	O
created	O
as	O
a	O
virtual	O
greeting	O
card	O
for	O
Macintosh	B-Device
systems	O
in	O
1984	O
.	O
</s>
<s>
In	O
1993	O
,	O
the	O
concept	O
was	O
ported	O
to	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
as	O
Xsnow	B-Application
,	O
and	O
was	O
included	O
on	O
a	O
number	O
of	O
Linux	B-Application
distributions	O
in	O
the	O
late	O
1990s	O
.	O
</s>
<s>
Even	O
though	O
Xsnow	B-Application
was	O
distributed	O
with	O
earlier	O
versions	O
of	O
Linux	B-Application
,	O
its	O
most	O
recent	O
versions	O
are	O
shareware	B-License
Microsoft	B-Application
Windows	I-Application
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
ports	O
with	O
added	O
features	O
.	O
</s>
<s>
The	O
Unix-based	O
ports	O
for	O
versions	O
<=	O
1.42	O
include	O
the	O
source	O
code	O
in	O
order	O
to	O
allow	O
compiling	O
to	O
other	O
platforms	O
,	O
but	O
the	O
software	O
is	O
not	O
considered	O
free	B-Application
software	I-Application
in	O
the	O
strictest	O
sense	O
.	O
</s>
<s>
Version	O
2.0.1	O
and	O
higher	O
are	O
free	B-Application
software	I-Application
.	O
</s>
<s>
Xsnow	B-Application
version	O
<=	O
1.42	O
:	O
Xsnow	B-Application
is	O
available	O
freely	O
and	O
you	O
may	O
give	O
it	O
to	O
other	O
people	O
as	O
is	O
,	O
but	O
I	O
retain	O
all	O
rights	O
.	O
</s>
<s>
It	O
*	O
is*	O
allowed	O
to	O
package	O
Xsnow	B-Application
for	O
Unix/Linux	O
distributions	O
,	O
CD-Roms	O
etc	O
,	O
and	O
to	O
make	O
the	O
necessary	O
changes	O
to	O
makefiles	O
etc	O
.	O
</s>
<s>
Versions	O
2.0.1	O
and	O
higher	O
use	O
the	O
GNU	B-License
General	I-License
Public	I-License
Licence	I-License
version	I-License
3	I-License
.	O
</s>
<s>
This	O
version	O
is	O
snow-only	O
and	O
does	O
not	O
use	O
code	O
from	O
the	O
Xsnow	B-Application
codebase	O
.	O
</s>
<s>
MacPorts	O
has	O
a	O
source	O
code	O
build	O
for	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
that	O
's	O
not	O
the	O
shareware	B-License
version	O
.	O
</s>
<s>
BSnow	O
,	O
a	O
snow	O
only	O
replicant	O
for	O
BeOS	O
is	O
bundled	O
with	O
Haiku	B-Language
.	O
</s>
<s>
This	O
version	O
does	O
not	O
use	O
code	O
from	O
the	O
Xsnow	B-Application
codebase	O
.	O
</s>
