Inland Empire
Inland Empire is a rather original take on steampunk, published as a rpg by this Anon on /tg/ nobody really knows. It features Vikings in zeppelins and phone-line hacking. It could be considered one of /tg/'s homebrews.
I'm glad someone remembered it.
The core rulebook was made in 2007, using Legends & Lairs' Sorcery & Steam. Anons seemed to like it, but complained that the fluff hinted at within the text wasn't enough to run the setting. In response to this, Terra Nova, a 34-page fluff book of vignettes surrounding the world's first atomic detonation, was posted on /tg/ in January 2008.
Both books can probably be found by searching Rapidshares.