The Graph Visualization Toolkit Gravisto is an editor for graphs and a toolkit for implementing graph visualization algorithms; it originates from a student project at the University of Passau and is the designated successor of Graphlet.

Graphlet is a toolkit for graph editors and graph algoithms. It offers a gui and a programming interface in Tcl/Tk and Java.

The Graph Template Library GTL can be seen as an extension of the Standard Template Library STL to graphs and fundamental graph algorithms

GTL-java offers a Java-Interface for GTL.

BioPath is a platform for a convenient electronic access to the biochemical knowledge. It provides information from different views and in distinct levels of detail. BioPath provides powerful search mechanisms for substances and reaction networks, it gives access to different types of information on enzymes, reactions and metabolism and automatically computes visual representations of complex reactions nets. BioPath is easy to use and can be updated and extended. The project expired and BioPath is no longer supported.

GraphEd is a toolkit for graph editors. GraphEd is replaced by Graphlet and is no longer supported.