Minetest
Description: Minetest is an open source voxel game engine. It is similar to Minecraft and allows players to explore procedurally generated 3D worlds and build anything they can imagine using blocks.
Type: software
Pricing: Open Source
Mtpaint
Description: Mtpaint is a simple, easy to use open source painting program for Linux. It has basic drawing and image editing features like layers, brushes, shape tools, color picker etc.
Type: software
Pricing: Free