The Black Dog of Doom offers a set of free wargames rules for fighting the Anglo-Zulu wars.
Zulu War
Rorke’s Drift Rules
Bill Molyneaux offers a set of free wargames rules for fighting the Zulu war.
Assegai Zulu War Campaign
Give some flavor to your Zulu war games with a campaign. You can get the Assegai rules, and map for free.
The Natives Are Restless Tonight
Matakishi has written The Natives Are Restless Tonight, a set of free wargaming siege rules for any game involving a large band of natives, and a small, but stalwart group of westerners. They would work for any game in the colonial era, including the Zulu War, Boxer Rebellion, Foreign Legion, North West Frontier and Indian Mutiny.
The rules use a card activation system, and involve rolling handfulls d6s. Casualties are determined by summing the attack dice and removing a figure for every multiple of 6, 9 or 12, depending upon the defensive situation.
British In Zululand Painting Guides
Duncan’s Colonial Modeling blog has a nice series of photos of British uniforms intended as a painting guide for the British in Zululand