Marvel Civil War Skirmish is a miniatures-and-cards game based on the airport battle in Captain America: Civil War. It is played on a checkers or other 8×8 board.
Fire! Ogon! Feuer! WWII Skirmish Rules
Fire! Ogon! Feuer! is a set of free wargames rules for World War II Skirmishes. The author writes:
These rules are designed for use by both beginners and veteran players. Play can be quick and easy OR made more realistic and slower by adding advanced options.
Combat during World War II focused on volume of fire into a specific area combined with rapid movement of combat units. The weapon systems were poor by modern standards and there was a constant design battle between shell penetration versus vehicle armor.
Innovative Casualty Markers
Ministories has a nice idea for casualty markers.
Biohazard War Card Game
Biohazard War is a DIY card game based on the Resident Evil series. The two player game uses familiar collectible card game mechanics.
Vortex Universal Miniatures Rule
Unified Theory Game offers Vortex, a set of free wargames rules for a wide variety of periods. They write:
Vortex is an omni-genre customizable miniatures game for two or more players as infinite as the players’ imaginations. Not only is it possible for a Roman centurion, an old west cowboy, a space pirate and a giant cybernetic alligator to meet on the battlefield, they could find themselves on the same team.
Vortex is a fast-paced game that keeps players involved at all times. The rules are easy and quick to learn while still containing vast amounts of diversity to provide for continually interesting play, game after game. A full campaign system is available which makes each game count, and allows the miniatures to change and progress. The players have the power to write their own story in the Vortex universe. A detailed tournament system is also available for those with a taste for short-term competition.