1450 – 1550 is a set of free wargames rules for playing miniature games set in the renaissance. The author says it’s “slightly more complicated than Tactica.”
Rules: Pike and Shot
Pike and Shot Rules
John Armatys offers a set of Pike and Shot rules for fighting large, multi-player English Civil War battles.
English Civil War DBA Variant
The Solitary Wargamer offers a variant of DBA for the English Civil War.
Home Fires ECW Campaign Rules and Map
The Solitary Wargamer offers a set of free English Civil War campaign rules called Home Fires.
Tercios Brevis Editio
Tercios Brevis Editio is a free version of the Tercios rules for the Thirty Years War.