Bob Cordery offers Redcoats and Natives, a set of free wargames rules for the colonial period.
Rules: Colonial
New Zealand Colonial Wars DBA Variant
Stephen Thomas offers a DBA variant for New Zealand Colonials Wars. The author writes:
These rules are intended to refight the battles of the New Zealand Colonial Wars, 1840-1872. They do not cover skirmishes They are based on DBA, and influenced by the article by Ed White on DBA and the Seven Years War (WI65), and Clive Clapson’s article on the Maori Wars (WI63). As in Ed’s article there are two assumptions:
1. The first round of close combat also includes short range small-arms and artillery fire.
2. Troops potency depended on their ability to deliver close range volleys or cold steel.
Colonial Rules For Heroscape Terrain
If you are lucky enough to have acquired HeroScape terrain, you may be interested in these Colonial Rules For Heroscape terrain.
DBX Colonial Rules
Pushing Tin offers a set of colonial rules in the DBX style.
Prehistoric Pocket Dinosaur Hunt Game
Prehistoric Pocket is a game of Lost World Dinosaur hunts. Interestingly, it uses coin flips instead of die rolls to resolve actions.