The game that put Crescent Moon Games on the map, Ravensword: The Fallen King [99¢ / Free] is on sale this week for 99¢. Originally released in late 2009, Ravensword was incredibly anticipated on our forums, and we really enjoyed playing through it. Since our initial review, the game has been updated with more items and quests, and provides an incredible amount of content for a buck.
Give the lite version a shot, or swing by the thread in our forums which has been going strong since last November. Either way, if you're at all interested in open world RPG's, picking up Ravensword will probably be the best dollar you spend today.