Beyond The River Don Campaign Rules

The Perfect Captain has released a campaign system for his Red Actions! rules set. From the Captain:

We have completely outdone ourselves this time! What if I told you this was a campaign game that takes maybe 30 minutes to create from scratch, with limitless scenarios, a different map each and every time, and has counters representing the following armies and their equipment: Reds (All over Russia), Whites (Kolchak, Deniken, Wrangel, Yudenich, Komuch, Kappelites etc), Greens (Mahknovists), Estonians, Latvians, Finns, Lithuanians, Ukrainians, Poles, Armenians, Turks, French, Greeks, Japanese, American, British Empire (Including Canadians, Australians, and Indians), and Freikorps.

Brigade Commander Modern Rules

Andy Watkins offers a set of free wargames rules called Brigade Commander, for games set in Cold War Germany. Given the equipment used, I suppose it also would be useful for gaming some other scenarios in which the combatants have old NATO and Warsaw Pace equipment.