The best. No other standalone UV tool compares.
Ranked in these QuestionsQuestion Ranking
Pro The fastest and toughest unwrapping algorithm
It's capable of handling shells made by more than one million triangles.
Pro Super intuitive and easy to use
Pro Several powerful algorithms to cut meshes automatically
New options have been added with the RizomUV 2018 release in May 2018.
Pro Has FBX support
Pro Totally scriptable using LUA
Pro Tool tips everywhere
Fast easy and makes sense. Headus is dated, and requires too many clicking around and navigating a dated UI. However RizomUV in my opinion is the fastest and easiest to use. Best packing and cutting automation.