Rocs aims to be a graph theory IDE for helping professors to show the
results of a graph algorithm and also helping students to do the
algorithms.

FEATURES
- Canvas for graph drawing.
- IDE for graph related programming, using JavaScript as its main
  language, plus the graph library.
- Nodes, graphs and edges are extensible from the scripting interface,
  so you can do anything you want.

WWW: http://www.kde.org/applications/education/rocs