VoxelSuite

has the only understandable controls and ui of any voxel software but the piece of junk just crashes on startup now

Воксели база.

This is a poorly made voxel graphics editing tool that somehow avoids the key point, if, as a game developer, you try using voxels instead of proper graphics, you will not magically become as succesful as Notch, indeed, this is almost as bad as using pixelcrap. As an editing tool this is one of the worst on the market and failed to establish any user base on Steam. So, the application isn't free, it's misleadingly advertised as so, for profit. While there's no up-front price for the base application, you're expected to pay $10 USD to the developer, basically digital panhandling/beggarware. Despite being free, this application peaked at just [b]5 concurrent users[/b] according to SteamDB. There's 130+ million gamers on Steam. For this to have so few people even try to use it (and not keep using it), that's complete failure for a product that nobody wanted.