[Blender Add-on] UniV - UV Toolkit

Blender Addon for UV Editor which aims to cover all sorts of operators for working with UV

Operators
Quick Snap - allows you to transform an island or geometry elements by Vertex, Edge Center and Face Center. There are two methods of calling the operator via the keys:
V - quick start, the nearest transformation element is selected immediately
Alt+V - here you can safely select the necessary element and change the modes to Island or Element mode

Stack - overlap islands with similar geometry

Weld - [W] connects selected vertices by common vertexes, if there is nothing to connect, it works as Stitch

Alt+Weld Button - connect by distance

Stitch - [Shift+W] connects islands to each other, preserving the islands' proportions. When called via keymap with sync enabled, the target island becomes the closest.

Unwrap - differs from the built-in operator in that it unwrap inplace.

Quadrify - [E] align selected UV to rectangular distribution

Straight - [Shift+E] straighten selected edge-chain and relax the rest of the UV Island