Motiva has recently revealed Unknit, an upcoming UV unwrapping and packing toolkit for Unreal Engine and 3ds Max.
A little is known about the feature set, but the process here is basically “set the maximum level of UV stretching you’re prepared to tolerate, and hit Start”.
Unknit will be released in the first quarter of 2018 with a “big promo price”, so we’ll have to wait for more details.