The Flipped Normals team covers everything you need to know about working with TopoGun 3 for retopology.
TopoGun was at the top of its game a while ago, and now, with the release of TopoGun 3, it is making more advancements. TopoGun is a stand-alone application for baking and retopologizing models.
Ultimately, the verdict is that TopoGun is an excellent retopology tool that’s affordable, fast, and easy to use.