Here’s an English Civil War variant of the Command and Colors rules. You’ll also need the Command and Colors: Napoleonics rules, which are freely available on the GMT Games website.
Command and Colors
Making A Command and Colors Terrain Table
Small World Productions has a tutorial on making a “hex” based terrain table for Command and Colors.
Memoir ’14 Rules
Here’s a set of rules for Memoir ’14, a World War Variant of Memoir ’44. I rather think the great war would work better with this rules set than WWII.
White Mountain Board Game
White Mountain is a hex and counter board game for the Thirty Years War. It’s designed in the vein of the popular Command and Colors system.
Renaissance Raiders Fastplay Border Reivers Rules
From the mind of Rudi Geudens comes Renaissance Raiders, a set of free wargames rules for recreating conflicts along the Anglo-Scottish border. Based on the Command and Colors system, these are card driven, hex based rules designed for fast play.