Umsat, a solver for SAT-problems

Here is the webpage for Umsat, a SAT-solver implementing several different constraint types. Apart from boolean clauses in CNF these include e.g. symmetry breaking constraints and cardinality constraints.

GrafPack, a Mathematica package for graph theory

Together with Per Håkan Lundow I have developed a Mathematica package which extendes Mathematicas standard discrete mathematics packaga in several ways. The package is maintained by Lundow and is available for download from his webpage .
The webpage for GrafPack

gteditor, a graph editor in Java

this is a progam that one of my students wrote as a project in computer science. It is a nice editor for manipulation small graphs in various formats.
The webpage of gteditor