Modelsaur allows you to directly dimple, extrude and color the mesh triangles on a sphere to make simple 3D objects. You can then export as a PNG or GIF to create an avatars or export as PLY or STL for 3D rendering or printing.
We shall celebrate with a pig! Or, a sort of a pig...
If you are looking for more up-to-date information consider visiting the modelsaur web forum.
Cheers