Steve Jackson Games' Generic Universal Role-Playing System is a skill-based universal RPG with no random elements in character creation. Supported by a large library of published sourcebooks in every imaginable genre, GURPS is a popular choice for do-it-yourself Game Masters.
GURPS fans and professionals alike love lists: Lists of all the skills, lists of all the books, and annotated lists of web sites are all a big part of the online GURPS community.
Unofficial GURPS worldbooks and sourcebooks in electronic form: Adaptions of popular novels, films, and other RPGS, as well as multi-author libraries of spells, characters, equipment and other modular material.