A small python script to programmatically edit Voxel Paint files.
Current features include:
Rectangular, color-based, and key-based methods for quick and easy selection
Voxel cloning for repetitive parts in your model
Transformation and reflection functions (but no rotation yet)
Easy color mapping and custom voxel grouping for partitioning your model
Eraser for erasing big mistakes while leaving the rest of your model intact
It isn't complete yet and there will likely be certain parts of it that have bugs,
but it will continually be refined until there's nothing left on the to-do list.
All you need is rudimentary knowledge of Python.