Here’s an excellent adaptation of Savage Worlds to the FireFly universe. I’m a fan of the all-too-short-lived Josh Whedon science fiction series.
Tim’s Miniatures Blog has some Age of Sail House Rules for Savage Worlds. He also has some Savage criticism of those who wrote the Pirates of the Savage Main rules.
Savage Barsoom are rules for playing games set on Edgar Rice Burrough’s Mars using Pinnacle’s Savage Worlds game.
PEG has released the latest version of Savage Worlds Showdown, their universal skirmish rules. It’s available for a free download.