Asset Forge allows everyone to create 3D models and 2D sprites using building blocks. Creations are compatible with most available game engines. You'll have access to a large library of pre-made blocks, each grouped in different categories. You can place an unlimited number of blocks in your creation after which it's possible to export and use in any game engine or modeling software.
The exported models are compatible with most game engines including Unity, Unreal, CryEngine, Blender and ThreeJS. The 2D sprites (PNG) are compatible with all game engines. For more information, samples and a list of blocks check out the official website below.