The Add-on "Magic UV" provides UV editing toolset.
Today, I release Magic UV v6.0.
The main update of v6.0 is support for Blender 2.8.
Magic UV is Blender's built-in add-on, so you can try this add-on without installation.
This add-on works in both Blender 2.7x and Blender 2.8.
See tutorial pages/video to know the detail features in Magic UV.
Lastly, I would like to say thanks for the contributors of this add-on.