Kategorien auf Wikipedia graphisch browsen
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.
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.
