JIGGLE: Java Interactive Graph Layout Environment

JIGGLE is a Java-based platform for experimenting with numerical optimization approaches to general graph layout. It can draw graphs with undirected edges, directed edges, or a mix of both. Its features include an implementation of the Barnes-Hut tree code to quickly compute inter-node repulsion forces for large graphs and an optimization procedure based on the conjugate gradient method. JIGGLE can be accessed on the World Wide Web at http://www.cs.cmu.edu/~quixote