Spice Trade on Steam
store.steampowered.com
Spice Trade offers a chance to rewrite history with Abu, a young man challenging European dominance. As he inherits land in Baghdad, Abu enters the spice trade to thwart European trade monopoly. Can he reshape Europe's fate? You decide the outcome in this game of strategy and empire-building!

The game seems to be open source. The sourceforge link also includes a Java download for Windows if Steam is not your thing.