Sengoku Jidai is a set of quick play samurai skirmish rules. There’s also a Korean supplement.
rules
World War II Skirmish Rules
The Tyneside Gamers offer a set of World War II skirmish rules. Lots of other rules sets at the page also.
Four Musketeers Skirmish Rules
Black Hat Miniatures offer Four Musketeers, a set of skirmish rules / scenario in which the Musketeers must retrieve the Queen’s earrings.
Able Spaceman Rules
Able Spaceman is a set of solo rules for spaceship battles.
7TV Star Wars Programme Guide
Crooked Dice has released a free programme guide for Star Wars for their 7TV miniatures wargame.