Warblocks is a set of free wargames rules using Jenga blocks as troops.
Miniatures Rules
Wastelands Post Apocalyptic Wargames Rules
The author writes:
Wasteland is a game of post-apocalyptic warfare between small bands of desperate fighters. You can play it as a skirmish war game using the character archetypes and weapon lists but it’s also designed to allow you to play fast-moving and memorable campaigns with two or more players.
Low Level Hell
Low Level Hell is a set of free wargames rules for helicopter actions in Vietnam.
Generic Legions – Big Battle Version
Generic Legions is a set of free wargames rules for science fiction warfare. This versions is, as the headline suggests, for big battles.
Frontline Skirmish Game For MegaBlox
“a versatile, yet simple turn-based strategy game that is fully customizable. The game is designed to make use of Mega Bloks Halo sets, but you can use any kind of equally-sized figurines including cheap army men, and is meant to be played on any kind of table or flat surface. Similar to games like WarHammer 40k or even chess, Frontline Skirmish contains very loose, simple rules and maximum customization.”
The game is on the pay-what-you-want model.