Here's a quick rundown (although someone at FDP could rectify any mistakes), AFAIK:
- All basic familiars from the PHB (in 0.5x0.5 counters)
- Aranea, Basilisk, Blink Dog, Cockatrice, Couatl, Demon (balor, marilith, succubus, vrock), Devil (lemure, osyluth), Displacer Beast (medium & Large), Dryad, Elementals (air, Earth, Fire & Water), Ettin, Genie (Djinn & Efreet), Giant (Hill, Fire, Frost, Stone, Storm & Cloud), Golem (flesh, iron & stone), Hag (annis, green & night), Hell Hound, Kuo-Toa, Naga (dark), Nymph, Ooze (gray ooze, gelatinous cube), Rakshasa, Riust Monster, Troglodyte, Worg.
- Ankheg, Carrion Crawler, Centaur (male), Chimera, Dragonne, Griffon, Hippogriff, Pegasus, Sphinx (andro), Unicorn
- Drider, Treant
- Bulette, Dragon (blue, bronze, copper, green, silver), Manticore, Wyvern
- Animals: Ape, Dog, Wolf, Wolverine
Plus different sizes of the Dragons that appeared in CC2 (gold, brass, black, white and red)
- Plus 8 dwarves, 14 elves, 4 gnomes, 4 half-elves, 4 halflings, 4 half-orcs and 37 humans, covering a wide range of classes for each race (e.g.: most wizards can double as sorcerors and psions, and some as monks). Humans, spcifically, have several options for each class, covering a spectrum of archetypes (e.g.: knights, templars, sages, thieves, explorers, barbarians...)
Whew!
Anyone care to check this list?