blockdiag and its family generate diagram images from simply text file, like graphviz
Graphopt is a graph layout tool that was created by Michael Schmuhl for graphs that other layout tools (Graphviz, for example) could not produce meaningful visual representations.
Combined with other utilities such as GraphViz, XMLStarlet allows for rapid application prototyping and development
This started with the simple question "how exactly does package X pull in package Y when I install it". The only way I knew of was to use aptitude interactively and just guess which package was the most likely culprit.
Kategorien auf Wikipedia graphisch browsen
"free as in beer"-graphing sw
