Jonathan Lampel writes:
After a full two years or more of work CG Cookie is releasing the long-awaited version 2.0 of RetopoFlow for Blender!
The development team went back to the drawing board (literally), taking everything we learned in 1.x and rebuilding the entire toolset from the ground up. RetopoFlow 2.0 introduces a cohesive retopology mode, whereby all tools work side-by-side, allowing for a fast and intuitive workflow that's not possible in any other Blender tool.