Blender 2.8 free retopology addon and tutorial - BlenderNation
8 awesome Blender Addons for Retopology - InspirationTuts
Retopology in Blender (Beginners Guide)
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.
RetopoFlow 2.0: Rebuilding a Blender Add-On From Scratch - CG Cookie
Awesome Blender Addons for Retopology | Blender Cloud Rendering
Instant Meshes -- Must Have Free 3D Retopology Tool - YouTube
Awesome Blender Addons for Retopology | Blender Cloud Rendering