I'mma plug Nightshade UV Editor. It has an awesome feature to set the texel density of your unwrap, so you can unwrap multiple objects at the same time and have them retain a consistent texel density.
deluxe UV, nightshade uv editor, and a editor i will release in a month, all include tools for setting consistent texel density, this is a more simple approach than the box mapping, since it is for sure to work in all game engines without extra shader instructions. Also everything in that scene, is using pretty set number…