Download Stuffed Beta 0.1 from here. Currently Windows only.
The interface provides a simple way of creating 2d shapes, but from then generating 3D patterns including darts and gussets. Suitable for balloons, beanies and plushies you can create quite sophisticated patterns from a simple drawing.
The pattern is exported as an HPGL plotter file which you can load into illustrator or other design packages, or send to a laser cutter to make your design real.
Here you can see people working on stuffed patterns created at the Craft 2.0 workshops. Note : the use of hand held friction based laser cutter replacements for these projects.