John Armatys offers a set of free modern skirmish wargames rules called Fireteam II They’re designed for use with 20mm figures.
Point Blank is a set of free wargames rules where the units are fire teams and squads. Soldiers are represented individually.
Once available as a commercial rules set — and a nice one it was — Knights and Knaves now is available as a download. Also available are the
More Knights & Knaves and Castles, Cogs & Chevauch�es expansions.
Sahibs and Sepoys is a set of free miniatures rules for the Indian Mutiny of 1857 – 1858. Author Alan Hamilton writes:
These skirmish rules are intended for the small actions which were typical of the Indian Mutiny. Thus individual characteristics are very important. The basic Unit is that commanded by a named character who is usually of Lieutenant, Captain or equivalent rank.
The suggested figure scale for rank and file is about 1:6 to 1:10 with 1:8 a good average. This scale is not used for named characters who are 1:1. This is justified in the attitude of the period. They are, therefore, cast in a heroic mould. The unit strength was calculated inbayonets or sabres the officers, sergeants, drummers and so on being extra to this establishment. Thus a company at its full strength of 100 bayonets would be an Officer, drummer, sergeant or strong man (optional) and 8 to 18 rank and file; cavalry squadrons similarly have an Officer, bugler and 4 to 9 rank and file. The Rank and File can include a proportion of Corporals, Naiks etc.
Mike Fischer offers a set of miniature rules called To A Pulp (nice pun). He writes
Pulp gaming, in which each player controls a character or faction from a 1930’s pulp thriller, is growing in popularity. Such games combine the visual appeal of miniatures gaming with aspects of role-playing games, allowing the players to control the actions of tough private eyes, seemingly-helpless dames, brave explorers, and all the rest. I wrote these rules mostly for my own amusement.
The rules are made for simplicity and fast play. The game is meant for use with miniatures, but you can download a set of paper minis for free (see Section XI). All you have to provide is a few six-sided (d6) and ten-sided (d10) dice. The game is meant for two or more players, but it can be used for solo gaming as well.