The Jiggernaut Frame Building Jig
While cruising though Kickstarter - cool site where people donate to fund various projects - came across this project, already fully funded and I'd assume in production.
Affordable jig to try your hand at building a bike frame. Fantastic idea and well executed. And affordable - at least during their pledge drive - $299 for the jig. $499 for jig and tube set to construct a road frame.
Dust off the old brazing skills from high school metal shop class, and you have yourself a fun winter project. As per their official site, not sure if available yet. I gotta find out - I want one.