The Blue Book of Dangers and Dweomers

It said about itself:

The blue book of dangers and dweomers is an old-school role playing game that includes:

Highlights include:

5 basic classes (Cleric, Druid, Fighter, Magic-user, Rogue) separated from race (Dwarf, Elf, Gnome, Half-Elf, Half-Orc, Human)
No level caps but favorite and restricted classes
Characters of any class can potentially use any weapon or armor
No feats but class features for Rogues and Fighters
Rules for deity specific Clerics
Firearms
Multi-classing
Ascending AC
Ability score-based saving throws
D6 based action resolution
Optional rules including: suggestions for grittier or heroic combat, corrupting magic, magical bloodlines, monstrous PCs, notes on the plane