From Deep Fried Happy Mice come a set of free wargames rules called Medals of Valor. The Mice write:

Medals of Valor is our system for recreating skirmish and tactical combat during the 20th Century. These are low intensity rules designed for fast play and fun. We have tried to maintain a feel for realism while understanding that a comprehensive detailed system would be very slow and cumbersome. In order to achieve this balance several aspects of tactical combat have been generalized or even in some cases ignored. The system requires that castings be mounted on individual bases. This system uses an extended period of time for a turn which allows for the completion of an action. For example acts of reloading and changing positions as needed can be completed within a game turn. Moves are considered to be a change of position (standing), moving (running) and assuming a defensive position (kneeling). Firing distances are extensive considering the small scale. Soldiers are armed with the weapon with which they are cast. Extra castings should be available for weapon exchanges and casualties.