The Wargaming Site Blog has a nice photo tutorial on making barbed wire emplacements for 6mm wargames figures.
6mm
En Avant En Masse Napoleonic Rules
En Avant En Masse is Jim Wallman’s diceless, divisional level Napoleonic Wargame. Jim writes:
Based on the En Avant! diceless battalion level game, this takes the concept to the next level. This system is designed to play out a corps battle using 6mm figures in about an hour or so. The intention is that there is a player per division, with a corps commander in overall control, per side. It is not intended that the players see or use the game rules � this is to be done by one or more umpires.
Solar Scourge Science Fiction Rules
Solar Scourge is a set of free wargames rules designed for 6mm science fiction miniatures.
Fire At Will
Fire At Will is a set of free wargames rules for 6mm fantasy battles.
Krieg Ist Mist WWII Rules
Krieg Ist Mist is a set of free wargames rule for 6mm games set in WWII.