Awesome Blender Addons for Retopology | Blender Cloud Rendering
Best Auto Retopology tool ever? - Blender and CG Discussions - Blender Artists Community
modeling - How to easily make mesh retopology? - Blender Stack Exchange
GitHub - LokiTheCuteBear/RetopoView: A small Blender addon that enables drawing colourful overlays over meshes for user-defined face groups - for marking topology flow during retopology/studying topology.