recently Mash has been released. It is a library for reading models in PLY format and creating Clutter actors from them. For reference, Blender is able to export to PLY. It means you can draw your models with Blender and use Clutter as rendering engine.
Clutter is a 3D canvas and animation toolkit while Blender is a 3D modelling suite.
What I've tested so far is porting the Monkey Viewer C example to Vala: code snippet and monkey PLY here.
That is going to be awesome, stay tuned!