Tulip is a software system dedicated to the visualization of huge graphs. GPL

Tulip 3.0.0 Beta 4 (Default branch)
Tulip is a software system dedicated to the visualization of huge graphs. It manages graphs with up to 500,000 elements (node and edges) on a personal computer (PIII 600, 256MB RAM). Its SuperGraph technology architecture provides the following features: 3D visualizations, 3D modifications, plugin support, support for clusters and navigation, automatic graph drawing, automatic clustering of graphs, automatic selection of elements, and automatic coloring of elements according to a metric.