<s>
Racer	B-Application
,	O
fully	O
named	O
Racer	B-Application
Free	I-Application
Car	I-Application
Simulation	I-Application
,	O
is	O
a	O
freeware	B-License
and	O
source	B-License
available	I-License
video	O
game	O
simulator	O
that	O
runs	O
on	O
Microsoft	B-Application
Windows	I-Application
,	O
Linux	B-Application
,	O
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
.	O
</s>
<s>
Although	O
Racer	B-Application
started	O
out	O
as	O
a	O
driving	O
simulator	O
,	O
it	O
also	O
has	O
features	O
that	O
are	O
usually	O
seen	O
in	O
racing	O
games	O
,	O
such	O
as	O
racing	O
against	O
AI	B-Application
cars	O
,	O
or	O
against	O
human	O
opponents	O
in	O
multiplayer	O
mode	O
.	O
</s>
<s>
Racer	B-Application
was	O
first	O
released	O
on	O
29	O
August	O
2000	O
.	O
</s>
<s>
Over	O
the	O
years	O
,	O
a	O
community	O
has	O
grown	O
around	O
Racer	B-Application
.	O
</s>
<s>
An	O
important	O
characteristic	O
of	O
Racer	B-Application
is	O
its	O
openness	O
;	O
The	O
formats	O
for	O
cars	O
,	O
tracks	O
and	O
other	O
data	O
are	O
documented	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
a	O
large	O
number	O
of	O
cars	O
has	O
been	O
created	O
and	O
published	O
,	O
in	O
a	O
large	O
variety	O
:	O
Formula	B-Application
One	I-Application
,	O
GT	O
,	O
vintage	O
,	O
trucks	O
,	O
daily	O
drivers	O
,	O
luxury	O
sedans	O
...	O
even	O
a	O
shopping	O
trolley	O
has	O
been	O
modeled	O
.	O
</s>
<s>
The	O
Racer	B-Application
software	O
is	O
free	O
,	O
in	O
the	O
sense	O
of	O
freeware	B-License
for	O
non-commercial	O
users	O
.	O
</s>
<s>
While	O
the	O
source	O
code	O
of	O
an	O
older	O
version	O
(	O
0.5	O
)	O
was	O
made	O
available	O
under	O
GPL	B-License
,	O
later	O
versions	O
are	O
not	O
under	O
an	O
open-source	O
license	O
.	O
</s>
<s>
Whilst	O
one	O
of	O
the	O
strengths	O
of	O
Racer	B-Application
is	O
its	O
open	O
file	O
format	O
,	O
perhaps	O
one	O
of	O
its	O
weaknesses	O
is	O
its	O
closed-source	O
stance	O
and	O
development	O
team	O
.	O
</s>
<s>
The	O
Racer	B-Application
community	O
contributes	O
to	O
testing	O
and	O
suggesting	O
features	O
that	O
should	O
be	O
added	O
,	O
but	O
the	O
development	O
side	O
of	O
Racer	B-Application
is	O
very	O
much	O
based	O
on	O
the	O
amount	O
of	O
time	O
the	O
developers	O
have	O
to	O
contribute	O
towards	O
it	O
.	O
</s>
<s>
This	O
translates	O
to	O
infrequent	O
updates	O
of	O
varying	O
quality	O
,	O
but	O
updates	O
are	O
often	O
very	O
feature-rich	B-Architecture
and	O
inspire	O
a	O
new	O
burst	O
of	O
energy	O
into	O
the	O
development	O
and	O
modification	O
of	O
cars	O
and	O
tracks	O
.	O
</s>
