I have a vast library of models made for Cube world.
Many people use CWME to make the models for their game, however, i do not.
I use "Qubicle Master Edition", a voxel based modeling software which i found is very suitable for Cube World.
You can see me use this software at twitch.tv/y2bcrazy.
I recommend you watch a few of my videos to understand the full use of Qubicle for Cube world.
I'm making this post so if ever you guys have issues or concerns using the software for making models, I'm here to help with my full potential.
This also includes how to make very clean design while avoiding making them "blocky and plain".
Here's my work for reference: