Similar in spirit to the late, lamented Space:1889 cloudships rules, Aeronef is about Victorian era armored flying gunships. There are some outstanding ships’ logs for the game here.
Ty Beard’s Fistfull of Tripods is a set of free wargames rules for fighting battles from H.G. Wells’ War of the Worlds. It is a tactical level game, where one stand is a platoon. I’ts designed for 1/300 (6mm) scale figures.
NOTE: This is an updated URL. The old one was no longer working.
Alan’s Landship Game is a set of free wargames rules that pits Victorians against Martians.
Majestic 12 Games has these demo rules for their Iron Stars miniatures wargame. I’ll let them explain:
Iron Stars is a game of space combat in an age of steam and steel. Set in a fictional universe based loosely on the writings of H. G. Wells and other fantasists, it provides a back story and ship designs from an alternate history in which the Martian Invasion actually happened, the ether is all?pervasive, and Cavorite is a reality. But, as with Starmada and other Majestic Twelve Games products, the focus is on players’ imaginations; a clear and concise ship construction system is provided so you can pit your own space dreadnoughts against the likes of the Royal Navy Ether Squadron or the German Aethermarine.
Royal Venusian Trading Company is a swords-and-planets exploration game with roleplaying elements based on old school D&D clones. From the author’s explanation:
In a fantasy Victorian Age universe, a team of ardent explorers are racing into unknown parts of the savage world of Venus in search of glory and riches beyond measure. Guided by hearsay, rumors, and third hand information, each Expedition will attempt to conquer the unyielding environment and plunge into the heart of the world of the cruel and fickle goddess of love.
The Game begins with the explorers outfitting their expedition. Then the team will move across the uncharted planet. Exploration, hunting, natives, natural, and other disasters will all have to be dealt with.