<s>
Graph	B-Language
Modeling	I-Language
Language	I-Language
(	O
GML	O
)	O
is	O
a	O
hierarchical	O
ASCII-based	O
file	O
format	O
for	O
describing	O
graphs	O
.	O
</s>
<s>
Cytoscape	B-Language
,	O
an	O
open	O
source	O
bioinformatics	B-Application
software	I-Application
platform	O
for	O
visualizing	O
molecular	O
interaction	O
networks	O
,	O
loads	O
and	O
save	O
previously-constructed	O
interaction	O
networks	O
in	O
GML	O
.	O
</s>
<s>
igraph	B-Language
,	O
an	O
open	O
source	O
network	O
analysis	O
library	O
with	O
interfaces	O
to	O
multiple	O
programming	O
languages	O
.	O
</s>
<s>
Gephi	B-Application
,	O
an	O
open	O
source	O
graph	O
visualization	O
and	O
manipulation	O
software	O
.	O
</s>
<s>
Graph-tool	B-Language
,	O
a	O
free	B-Application
Python	B-Language
module	O
for	O
manipulation	O
and	O
statistical	O
analysis	O
of	O
graphs	O
.	O
</s>
<s>
NetworkX	B-Application
,	O
an	O
open	O
source	O
Python	B-Language
library	O
for	O
studying	O
complex	O
graphs	O
.	O
</s>
<s>
(	O
SocNetV	O
)	O
,	O
a	O
free	B-Application
software	I-Application
application	O
for	O
social	O
network	O
analysis	O
and	O
visualization	O
.	O
</s>
<s>
Tulip	B-Protocol
(	O
software	O
)	O
is	O
a	O
free	B-Application
software	I-Application
in	O
the	O
domain	O
of	O
information	B-Application
visualisation	I-Application
capable	O
of	O
manipulating	O
huge	O
graphs	O
(	O
with	O
more	O
than	O
1.000.000	O
elements	O
)	O
.	O
</s>
<s>
yEd	B-Language
,	O
a	O
free	B-Application
Java-based	O
graph	O
editor	O
,	O
supports	O
import	O
from	O
and	O
export	O
to	O
GML	O
.	O
</s>
<s>
The	O
Graphviz	B-Language
project	O
includes	O
two	O
command-line	O
tools	O
(	O
gml2gv	O
and	O
gv2gml	O
)	O
that	O
can	O
convert	O
to	O
and	O
from	O
the	O
DOT	O
file	O
format	O
.	O
</s>
