Cubik Studio

This is just a small addition, but something I used a good deal in Cubik Pro was the ability to move the face in the UV window with the arrow keys. It's super useful for, among other things, textures that are mirrored to the opposite side of an image. Instead of clicking and dragging, you can just move a certain number with the arrow keys, and it's much faster.

I agree, This was incredibly useful for tiny UV maps as well.
Cubik Studio allows you to zoom in on the UV window, though,
which solved the problem of trying to map it with microscopic movement.

I vote for this as well.