<s>
TouchToolkit	B-Library
is	O
a	O
software	O
development	O
kit	O
to	O
simplify	O
the	O
complexities	O
of	O
multi-touch	B-Application
application	O
development	O
and	O
testing	O
.	O
</s>
<s>
The	O
framework	O
currently	O
supports	O
WPF	B-Device
4.0	I-Device
and	O
Silverlight	B-Application
4.0	I-Application
.	O
</s>
<s>
The	O
key	O
features	O
of	O
TouchToolkit	B-Library
are	O
:	O
</s>
<s>
A	O
domain-specific	B-Language
language	I-Language
to	O
define	O
new	O
gestures	O
including	O
multi-user	O
,	O
multi-touch	B-Application
scenarios	O
.	O
</s>
<s>
TouchToolkit	B-Library
is	O
a	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
software	I-Application
under	O
GNU	O
Library	O
General	O
Public	O
License	O
(	O
LGPL	O
)	O
.	O
</s>
<s>
The	O
core	O
framework	O
is	O
written	O
in	O
C#	B-Application
for	O
Microsoft	O
.NET	O
4.0	O
and	O
Silverlight	B-Application
4.0	I-Application
.	O
</s>
<s>
TouchToolkit	B-Library
is	O
developed	O
in	O
at	O
as	O
part	O
of	O
a	O
.	O
</s>
