Graphviz

Graphviz is visualization software for graphs. Its project home is a graphviz.org.

On this wiki we have enabled the Graphviz extension for MediaWiki, see also some more examples.

Example 1
 digraph G {Hello->World!}

Example 2
digraph G { rankdir=LR; Alice -> Bob [label=" trust value = 0.85 (very high trust)"]; Carol -> Bob [label=" trust value = 0.1 (very low distrust)"]; }

More examples
See some more examples.