Thanks to the use of Standards for the storage and description of these resources, they can all be listed from a single access point, as demonstrated here.
Graph visualization is a way of representing structural information as diagrams of abstract graphs and networks. Automatic graph drawing has many important applications in software engineering, database and web design, networking, and in visual interfaces for many other domains.
Graphviz is open source graph visualization software. It has several main graph layout programs. See the gallery for some sample layouts. It also has web and interactive graphical interfaces, and auxiliary tools, libraries, and language bindings.
Compiled version for Windows, Mac OSX, Linux