Finger Tools
On a touchscreen, you often have a simplified interface, with very few options, commands or tools. I was thinking about how to improve interaction in canvas-based applications (drawing, painting, charts, diagrams, etc), and it occurred to me that you often have fewer commonly-used tools than you have fingers. So, I created a UI concept/prototype that I call Finger Tools (or perhaps Touch Tools, or the Tool Glove, or some other such thing).
When you multi-touch, each finger is assigned a tool, which you can then use with a single gesture. Clever.