War In Space is a set of free wargames rules for star ship combat. What makes it different is that it uses standard playing cards for giving orders.
rules
Corvus On Land Rules
Corvus on Land is a set of free wargames rules to accompany the Richard Lee’s CORVUS (or any other Ancient Naval rules) when played in 1/1200 or smaller scales.
Aquanautica Imperialis Warhammer 40K Naval Rules
Aquanautica Imperialis is a set of rules for naval games in the world of Warhammer 40K.
Carnevale: Street Combat in 18th Century Venice
Carnevale is a set of rules for a very interesting setting: 18th Century Venice. The game has the ubiquitious stat lines and a dice pool mechanism. Its worth taking a look, even if 18th century Venice isn’t your thing
The Dice Flew Furiously — Warfare in the Age of the Machine Gun
The Dice Flew Furiously is Ross MacFarlane’s set of rules for modernistic warfare. From his notes:
Notes: This is a simple set of rules for playing wargames in the Age of the Machine Gun. They are meant to provide an enjoyable game and to be evocative of stories told rather than an accurate simulation or recreation of experience or fact. More specifically, they aim to work in OSW fashion, not worrying about consistent time and ground scales and operating on multiple levels at once. Figures and vehicles are treated more or less as individuals so a player can get that emotional feel of being there in the midst of things while putting dozens if not hundreds of toy soldiers on the table and getting the feel of commanding a “battalion” or even a “brigade”, yet still be able to finish a game in 2 to 4 hours. The rules are intended for use with individual figures of 20mm size or larger but it should be able to be used with multi-figure bases either counting each base as a figure or by marking hits.