Second Thunder - Open Combat Sword Masters Expansion

The Sword Masters expansion for open combat can be pre-ordered from Second Thunder:

Open Combat - Sword Masters
Extra skills, abilities, weapons, scenarios and rules to expand your games of Open Combat

Link: Second Thuinder 

Second Thunder - Kickstarter Ending Soon

The Kickstarter for the Open Combat rules is ending soon:

Link: Campaign on Kickstarter
Link: Second Thunder

Second Thunder - Open Combat Skirmish Rules Kickstarter

Second Thunder is running a Kickstarter campaign for their Open Combat skirmish rules:

Link: Campaign on Kickstarter
Link: Second Thunder