Design your own frame

This is a wonderful project that gives bike designers access to a professional tool that's Open Source (free to use). 

rattleCAD guides you through the design process by configuring the base geometry before refining the bicycle frame itself. Based on this refinement rattleCAD creates workshop drawings including the main miters of round tubes and settings for different frame jigs. rattleCAD also provides a set of components to build a bicycle mockup and supports different export formats to print and reuse all drawings generated inside rattleCAD.