UV Toolkit 2.0 for Blender 2.8 -3.0x

[Mephist0]

No, but you can find them here.

Texel Density Checker 3.2.1 [UPDATE 16.10.20]

Thank you for report about gumroad bug. It’s very strange product link conflict. I sent message about this problem to gumroad’s support.

[UV Packmaster] Efficient UV packing solution for Blender (C++ based, multithreaded)

Sure, I will add it to our TODO list.