The Stars Our Decimation: Voidstriker is a set of fleet oriented starship combat rules. They can be used as a board game, and with miniatures and hexless play.
The Miniature Wargaming Editor
Interspace Exploration and Exploitation Board Game
Interspace is an exploration and exploitation style board game free for the downloading.
Dragon Rage Classic Board Game
Dragon Rage is a free print-and-play version of the old Dwarfstar game. From the website:
DRAGON RAGE is a game of mythical creatures attacking a walled medieval city. The game-board is a full color aerial view of the city and surrounding territory, and the counters include knights, infantry, heroes, wizards, dragons, ores, trolls, great birds, giants, and other mythical creatures and beasts. The game rules include six scenarios, and a table for creating your own games with different combinations of monsters and city defense forces.