UVLayout is a stand-alone application for the creation and editing of UV coordinates for 3D polymeshes and subdivision surfaces. Used by professionals in the games and visual effects industries, by hobbyists of all ilks and by students, UVLayout's unique approach gives texture artists the tools to produce high quality low distortion UVs in significantly less time than they would by traditional methods.
Using UVLayout could be described as the opposite of dress making; instead of cutting out a flat pattern and sewing that up to make clothing, in UVLayout the object is cut into pieces that are then flattened out to make the pattern. These flattened UV shells are not just planar projections; a dynamics based algorithm is used to spread the UVs out, as you watch, so that there's minimal stretching, compression or skewing of textures when they're applied to the object.
Some major features of UVLayout are:
OBJ import and export
Edge-loop Detection for quicker UV seam selection
Symmetry Editing for faster flattening of symmetrical meshes
Edge Straightening on shell boundaries and interiors
Flattening Brushes for local tweaks of the automatically generated UVs
Auto Packing of UV shells to minimize wasted texture space
Auto Stacking of similar shells for shared texture space usage
Subdivision Surface calculations based on limit surface shape
Unlimited Undo of all editing functions
Plugin Interface for integration into other applications