These random generators from The Dungeon Dozen are for generating "synthetic humanoids" for whatever warped purpose a "bio-sorcerer" might have, but my own favorite warped purpose (and what the potential results most remind me of) is for creating the sort of evil sorcerers themselves that appear in Thundarr the Barbarian. They are perfect for use with Gamma World, Mutant Future, Barbarians of the Aftermath, Cartoon Action Hour, and, of course, Under the Broken Moon. In fact, some of the results are not unlike certain Marvel villains and could be used with any number of superhero role-playing games.
Terrible Eyes also seems appropriate for this villainous kit. I wouldn't use it for every post-apocalyptic sorcerer, though. Maybe one in five.]