As you know, Steam has launched its community rating service, Steam Greenlight, a system that developers can contribute their games to, which can then get upvoted by the community in order to pick those that will be granted the honor of being accepted on Steam. You can read more about it in the official FAQ. However, submissions seem to be unmoderated at the moment, and there's a lot of "white noise" games being submitted, so good ones can get lost and remain unnoticed. Here is a list of indie RPGs currently on Greenlight that might be worthy of your vote, with links to their Greenlight pages:

• The Age of Decadence, Iron Tower's single player turn-based isometric post-Roman RPG.
• Swords and Sorcery - Underworld, Charles-cgr's homage to the Might and Magic series.
• Underrail, Styg's Fallout-inspired postapocalyptic RPG that recently got an awesome demo.
• Expeditions: Conquistador, a tactical RPG set in Central America during the Conquista.
• Frayed Knights, Rampant Coyote's party-based dungeon crawler.
• Inquisitor, the Czech RPG we recently posted about.
• Driftmoon, a nice top-down indie RPG.
• Malevolence: The Sword of Ahkranox, that "infinite" first person roguelike.

Obviously, only those with a non-dummy Steam account can up- or downvote a game. Someone should tell the Knights of the Chalice dev to submit it there. Maybe if it makes it on Steam we can finally get a sequel.