For those who love Epic (6mm scale), Troublemaker Games is a great resource. The infantry for the most part fits nicely in with GW Epic. The Skinnerz tend to be a good head taller than the GW Epic Ork infantry, but there are some really cool heavy armored troops that work perfectly as leaders.
Troublemaker Games also designs rules. Their first game, Timeline 300, is a 10mm scale Steampunk wargame with a resource management system.
As you can see below, the Troublemaker vehicles are much bigger than their equivalent GW Epic Space Marine counterparts, but should fit in nicely with GW Imperial Guard heavy tanks and vehicles.
Novan Super Heavy Tank, GW Landraider
Novan Rorqual, Novan Super Heavy Tank, GW Landraider, GW Rhino, Novan Galdstonian, Novan Avenger
Novan Super Heavy Tank, GW Landraider, Novan Gladstonian
Novan Super Heavy Tank, GW Landraider
Cyber Shadows
Cyber Shadows Specialist
Cyber Shadows Heavy Cyborgs
Skinnerz
