Iceking's Tools - Released Scripts and Themes - Blender Artists Community
Blender 2.8 Retopology with the free Fast Sculpt Addon - BlenderNation
Blender JSculpt Retopo and Mesh Features - YouTube
Blender Retopology 101
A True Retopology Shader for the Modeling Viewport — Right-Click Select
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
RetopoFlow 3 - Retopology Toolkit for Blender - Blender Market