Ircfactmodeldb
This is a wiki page for the thingiverse factoid, which was growing to a rather large size
Thingiverse' http://www.thingiverse.com/
CubeHero: https://cubehero.com/
OnBook: http://onbook.com/
FabFabbers: http://www.fabfabbers.com/models/
BLD3R: http://www.bld3r.com/
YouMagine: https://www.youmagine.com/
Repables: http://repables.com
Yeggi: http://www.yeggi.com
ShapeDo: http://shapedo.com/
WARNING [NSFW]: The following links are definitely not safe for work, and may be considered offensive.
MakerLove: http://makerlove.com/
Dongiverse: http://dongiverse.com/