Software
 
LEDA
lu.cs.co.graph (java?)
http://www.ens-lyon.fr/~gsilber/nestor_doc/Graphlibrary.html
http://www.c3.lanl.gov/~reid/Web_papers/genGraphToolTR/node12.html
MLRISC
http://www.hisys.tzo.com/home/rigo/visualizer.html
http://kohlrabi.cs.umanitoba.ca/G&G/GraphLib.html
Generic Graph Component Library