Graphillion is a Python software package on search, optimization, and
enumeration for a graphset, or a set of graphs.

 - Lightweight data structures for handling x-illions of graphs
 - Search, optimization, and enumerate large and complex graph sets
 - Efficient implementation extending Python with C/C++
 - Working with existing graph tools like NetworkX
 - Open source MIT license
 - Well tested: more than 600 unit tests
 - Fast prototyping, easy to teach, and multi-platform

WWW: http://graphillion.org/