From publisher blurb:
Warrior, Rogue & Mage is a simple, lightweight roleplaying game that allows a group of players and a game master to experience epic adventures in a fantasy world filled with wondrous magic. This System Reference Document contains the complete game rules, including character creation, combat, magic, equipment and monsters.
The rules are made available under a Creative Commons Attribution 3.0 Unported license. This means you can use this SRD as a basis for your own games, supplements etc. which you can even use commercially as long as you credit the original author.