Scenarios for the wars in Southern Africa from 1838 to 1884 is free, and designed for the Victorian Steel rules. The scenarios are easily adaptable to other rules sets, though.
Mars Or Die is a set of free wargames rules for Victorian era games set on Mars.
Dark Days of the Admiralty are a set of rules for Victorian Warfare:
These rules represent mid Victorian naval warfare, in many ways as naval officers of the time assumed it might be.
They are intended for fleet actions between the major powers. In fact there were no such actions in this period, from Lissa (1866) to Tsushima (1905). There were however many actions involving smaller powers – for example the wars in South America, the American Civil war and some small actions involving the great powers in for example the Franco-Prussian war.
A collection of images from 19th century London. Useful for all those steampunk and Victorian gamers out there.