AGD - Algorithms for Graph Drawing - AGD offers a broad range of existing algorithms for two-dimensional graph drawing and tools for implementing new algorithms. It is a product of a cooperation of groups in Halle, Köln, and Saarbrücken supported by the DFG in the program "Design, Analysis, Implementation, and Evaluation of Graph Drawing Algorithms".

GDToolkit - a Graph Drawing Toolkit - GDToolkit (also known as GDT) is a Graph Drawing Toolkit designed to efficiently manipulate several types of graph, and to automatically draw them according to many different aesthetic criteria and constraints.

Tom Sawyer - Graph management, layout, and visualization software. Free demo downloads.

Pajek - a Package for Large Network Analysis - This program runs under Windows NT/9x and provides some analysis tools for large networks and Graph-drawing capabilities

Graphlet - A toolkit for graph editors and graph algorithms

PIGALE - Public Implementation of a Graph Algorithm Library and Editor - PIGALE is a graph editor and an algorithm library essentially concerned with planar graphs. This library, which is written in C++ and interfaced with the LEDA library, is particularly intended for graph theoretical research. PIGALE is free and available by anonymous ftp.

aiSee Graph Layout Software - aiSee automatically calculates a customizable layout of graphs specified in GDL (graph description language). aiSee supports 15 basic graph layout algorithms, recursive subgraph nesting, fish-eye views and easy printing. It has been optimized to handle large graphs automatically generated by applications (e.g. compilers).

CICA Project Graph.Embeddings - Display large graphs with as many as 20 thousand nodes and over 500 thousand edges, given either a 2 or a 3D embedding. The user can interactively view both gobal or local features of the graph.

ILOG JViews Graph Layout Package - This pure Java component of the ILOG JViews Component Suite offers numerous graph layout algorithms for applications such as process and workflow diagrams, business organizational charts, network management displays and supply-chain diagrams. Demonstration version download.

Graphviz - Graph Drawing Programs from AT&T and Lucent Bell Labs (open source).

YFiles Java Graph Drawing Software - A JAVA library providing a component for the visualization of graphs and several graph drawing algorithms.

daVinci Presenter - daVinci Presenter draws automatically large, directed graphs in high quality. It includes a graph editor, navigation features, an API for use by other programs and is available for Windows, Linux and Solaris in English and German.

Tulip - System dedicated to the visualization of huge graphs. It manages graphs with a number of elements(nodes and edges) up to 500.000 on a personal computer. It features 3D visualization and modification.