cluster	crazy	datastruct	fsm
Genetic_Programming	hello	lion_share	profile
psg	sdh	siblings	switch
traffic_lights	unix	world	twopi2
ER	fdpclust	philo	process
softmaint	transparency	root	kennedyanc
gd_1994_2007	networkmap
gradient angles	gradient colors	gradient linear angle	gradient radial angle
graph,cluster,node gradients	table and cell gradient	cluster gradient	data structure gradient

Also see Yifan's gallery of large graphs, all generated with the sfdp layout engine, but colorized by postprocessing the PostScript files.

Please send copyright-free donations of interesting graphs to: Yifan Hu