I really like using an add on for Blender called the PolyQuilt tool which works very similarly to Maya's Quad Draw which I also like, but it has even more functionality since you can work in other modes beyond vertex (edges, tris, quads and n-gons) and because your doing this in edit mode, you have access to Blenders full…
I used to use 3D coat, but I use SpeedRetopo for Blender now. It used to be free, but now is $10, worth it though. It pretty much puts all of the tools you need to retopo in blender in a central location, plus some extra. I wanted something that was utilizing my modeling package of choice, I didn't see the need to have an…