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.
   http://www.dia.uniroma3.it/~gdt/

Tom Sawyer Software  
   Graph Analysis and visualization component software for Java, C++, ActiveX and .NET. Free trial download.
   http://www.tomsawyer.com/

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.
   http://vlado.fmf.uni-lj.si/pub/networks/pajek/

Graphlet  
   A toolkit for graph editors and graph algorithms. Unix and Win32 binaries for free download.
   http://infosun.fmi.uni-passau.de/Graphlet/

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
   http://www.aisee.com/

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. GPL.
   http://www.tulip-software.org/

PIGALE - Public Implementation of a Graph Algorithm Library and Editor  
   PIGALE is a graph editor and an algorithm library essentially concerned with planar graphs. Written in C++ and interfaced with the Qt library, it is particularly intended for graph theoretical research. PIGALE is released under GPL.
   http://pigale.sourceforge.net/

yFiles - the Java Graph Drawing Library  
   yFiles is an extensive Java class library that provides algorithms and components for analyzing, viewing and layouting graphs, diagrams and networks.
   http://www.yworks.de/en/products_yfiles_about.htm

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, Ana
   http://aragorn.ads.tuwien.ac.at/AGD/

GraphViz  
   Development home of the open source Graph Visualization Project from AT&T and Lucent Bell Labs.
   http://www.graphviz.org/

Graph Drawing Resources  
   Links to research groups and software.
   http://www.cs.brown.edu/people/rt/gd.html

Cabri-graphs  
   Free Macintosh software for graph theory.
   http://www-cabri.imag.fr/CabriGraphes/cabri_anglais/gb_cabri_graph.html

Graph Visualisation Experiments  
   Attempts to apply force-directed layout (by Touchgraph) on various datasets, including dmoz.org categories and web site link structures.
   http://kisd.de/~marian/graphvis/

GoVisual  
   GoVisual-API is a library of layout algorithms that can be integrated into C++, .NET or Java applications. Includes advanced layout for UML diagrams and cluster diagrams.
   http://www.oreas.com

QuickGraph  
   A C# graph library with Graphviz support, provides directed/undirected graph data structure for .Net.
   http://www.dotnetwiki.org/DesktopDefault.aspx?tabid=129

Mascopt  
   A set of java tools for network and graph optimization problems. It features basic graph algorithms and graphical user interfaces. Mascopt is under LGPL license.
   http://www-sop.inria.fr/mascotte/mascopt

Graph Magics  
   An editor for graphs with a generator tool and processor of various algorithms: shortest paths, spanning tree, maximal clique etc.
   http://www.graph-magics.com

Carrier-class network topology swing components  
   TWaver is a complete suite of Java graphic components for telecommunication operations support systems (OSS).
   http://www.servasoft.com

Graph Drawing Software  
   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, FreeBSD and Solaris in English and German.
   http://www.informatik.uni-bremen.de/agbkb/graph-visualization/

ILOG JViews Graph Layout Package  
   ILOG JViews Graph Layout Package simplifies complicated diagrams. The package rearranges complex graph data sets into clear on-screen drawings. Core information represented by nodes and links is much easier to understand.
   http://www.ilog.com/products/jviews/diagrammer/

The PPGraph graph editor  
   A simple graph editor for MS Pocket PC 2002. Supports the GML file format.
   http://www.cs.usyd.edu.au/~carsten/ppgraph/