GraphThing is a tool for creating, manipulating, and studying graphs. These "graphs" are mathematical objects, that describe the relationships between sets; they are not 2D plots, charts, or any other sort of visual object. Current features include:

License: GNU GPL.
Tags: discrete mathematics, graph theory.
Interface: X.
Source language: C++.
Requires gtkmm 1.2.8+.
Maintainer: David Symonds.
Developer: David Symonds.
Homepage: http://graph.seul.org/.
Support: graphthing-discuss@seul.org.