You may have thought that the Renaissance Deluxe D100 rules were only useful for black powder games, but Adrian Jones shows their flexibility with a FREE one-shot adventure and resource pack which pits Celtic Adventurers against Viking raiders in an 11th century adventure in the spirit of Robert E. Howard...Download it now! http://rpg.drivethrustuff.com/product/113819/The-Wolves-of-the-Coast
I have been interested in the Renaissance rules, although I've not yet dug into them very deeply. This adventure might be a good catalyst to do so. The SRD is also free, being the core of the Clockwork & Chivalry RPG and based on OpenQuest.