Version 3.0 Beta released

Ultimate Unwrap 3D v3.0 Beta is now available to registered users!

Here is an overview of v3.0 Beta features:
Shared UVs. Create and organize UV islands.
New edge selection mode. Select edges in the UV Editor and 3D views.
Highlighted shared UV points and UV edges.
Highlighted boundary edges on the 3D model.
Highlighted seams in the UV Editor.
UV Locking. UVs can be locked for tools such as LSCM UVs.
UV Marking. UV edges can be marked for easy cutting.
Interactive seam picking mode. For marking seams in the 3D views.
3D Gizmo selection axis. For easier moving, rotating, and scaling in the 3D views.
Export textured UV map. Makes use of both UVsets.
Import/export lights. More compatibility between file formats.
Light Editor. For editing the properties of lights.

I have been with UU3D for more 4 years and cant recommend it enough.
On the other hand almost all of the modern modellers have their own good UV tools, for example Silo 2

Shared UVs. Create and organize UV islands.
what does mean?

Shared UV means that different skins have the same UV.

UV Island is an separate (small or medium) area of UV coords.

I would to see an example ..but sounds interesting