Space 1889 was/is one of my favorite RPG settings. Here’s a short film/teaser set in the 1889 universe.
Lady Blackbird is a free RPG module and fast play rules set with a steampunk flavor. From the introduction:
Lady Blackbird is on the run from an arranged marriage to Count Carlowe. She hired a smuggler skyship, The Owl, to take her from her palace on the Imperial world of Ilysium to the far reaches of the Remnants, so she could be with her once secret lover: the pirate king Uriah Flint.
HOWEVER, just before reaching the halfway point of Haven, The Owl was pursued and captured by the Imperial cruiser Hand of Sorrow, under charges of flying a false flag.
EVEN NOW, Lady Blackbird, her bodyguard, and the crew of The Owl are detained in the brig, while the Imperial commander runs the smuggler ship’s registry over the wireless. It’s only a matter of time before they discover the outstanding warrants and learn that The Owl is owned by none other than the infamous outcast, Cyrus Vance.
For those of you looking for a different setting (indeed, a different world) for your steampunk games, you could take a look at Steamworld Daleth. The author writes:
Steamworld Daleth is a gothic world on an alien planet. Call it an imaginary country, a geofiction or a follie. During the many years I have worked on Daleth (now over 20 years) the world has become what she is now: a steampunk/gothic world where the echo of the Victorian Age still sounds, but where many odd things are yet to be discovered. It’s a mix of fantasy and reality, a dreamscape of my imagination. Daleth can be used as a setting for the role playing game Intrigue & Illusions, but is not developed as such. Daleth is much more than a mere setting for a RPG. It’s a world with its own dynamics.
Timeline 300 is a set of steam-punkish rules for a now-defunct line of miniatures. The rules, though, can be applied to other figures.
The second edition Maifaux Rules are available free for the downloading.