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.
Awesome Blender Addons for Retopology | Blender Cloud Rendering
Retopology in Blender using PolyQuilt addon. Comprehensive guide. : r/ blender
RetopoFlow 2.0: Rebuilding a Blender Add-On From Scratch - CG Cookie
modeling - How to easily make mesh retopology? - Blender Stack Exchange