bloed
This is a (more or less) simple block-based level editor for Unity. It allows creating geometry by combining 1x1x1 blocks (or “bloxels”) of different shapes - a bit like Lego. The tool can be extended with your own block models and textures. While bloed is an editor mainly, the bloxel API is usable at run-time too, for procedurally generated content.
It is meant as a quick prototyping tool for some of our game projects. You can find some projects under the bloed tag.