Hai Nguyen has ported over his Maya Moonshine plugin to Cinder. It is now called CinderISO. It is a multi-threaded particle mesher and it's a beauty.
In the following images, I have created a dynamic metaball from a group of flocking particles. All of the rendering was done from within Cinder using GLSL shaders. Eventually, I saved out the form as a .obj file and then converted it to a .stl using Blender. I uploaded the 3D files to Shapeways and made some nice 3D prints from these metaball shapes.