Blackmoor D&D 4th Edition: The Inventor Class

From the introduction: Rather than tap into the arcane forces of magic, or submit yourself to the hierarchy of the divine, you've chosen a different approach to study and power. You work in clockwork and steam, in gears and springs, in alchemical reagents and conductive coils. You are an engineer and scientist, and in your devices reside power equal to any sword or spell.