Hola! I'm glad to announce that I've just started to work on a new asset pack that will get updated every day : Tiny Dungeon - Desertic. 

They work best with dungeon crawler, rogue like, rogue lite, and rpg games, but you can use them for any other game idea that you have. The pieces are isometric, so you can use it for 3D and 2D games as well. They are modular, so you can connect multiple rooms together.

The license is in creative commons, no derivative, so you can use them for both free and commercial projects.

Enjoy, and don't forget to share your work with us in the comment section!