UVPackmaster 2 is a second release of a popular UV packing solution for Blender 3D. Its robustness comes from the fact that the core of its algorithm was written in C++ and runs as a separate multi-threaded application. However, the solution is a typical Blender add-on from the users viewpoint - you install it using the standard procedure for Blender add-ons.
The add-on is available in two variants: for Blender 2.79 and Blender 2.8. You will receive access to both variants if you purchase the product. In order to run the add-on with Blender 2.8 use the zip file with the 'blend-2.8-beta' suffix. If you see an error when enabling the add-on make sure you are using the latest Blender 2.8 build.
https://gumroad.com/l/uvpackmaster2
The add-on is available in two variants: for Blender 2.79 and Blender 2.8. You will receive access to both variants if you purchase the product. In order to run the add-on with Blender 2.8 use the zip file with the 'blend-2.8-beta' suffix. If you see an error when enabling the add-on make sure you are using the latest Blender 2.8 build.
https://gumroad.com/l/uvpackmaster2