Charge! is a set of fast play ancients rules from Tom Hinshelwood.
The Battle of Chaeronea, 338 BC is a set of free wargames rules for recreating Philip of Macedon’s greatest victory. These are fast play rules from the Junior General series.
Rebel Publishing offers “Two For Tea”, a set of fast play rules for the American War of Independence. I’ve tried them, and they work well.
Jon Linney offers a set of Fast Play Napoleonic Rules. The author writes:
These rules provide a fast paced game with simple rule mechanisms that allow players to concentrate on their tactics and enjoy the ‘look’ of their tabletop battle, rather than have their heads buried in rule tables. Elements shoot and fight individually but move and test morale within their unit. One or two rule mechanisms have been ‘adapted’ from other rule systems (as I liked them); as they say imitation is the sincerest form of flattery! Players will need a table approximately 6′ by 4′ laid-out with suitable terrain. At least one D6 die and a measuring device each (measuring stick or rule), and of course two opposing armies. The measurements are for 15mm figures.