GURPS Supers=>http://www.sjgames.com/gurps/books/Supers
GURPS Aliens=>http://www.sjgames.com/gurps/books/Aliens
GURPS Bestiary, 2nd Ed=>http://www.sjgames.com/gurps/books/Bestiary
GURPS Fantasy Folk, 2nd Ed=>http://www.sjgames.com/gurps/books/FantasyFolk
GULLIVER Supplement (scale rules)=>http://www.io.com/~tbone/gurps/GULLIVER/