It’s for the Nintendo DSi.  Here are some of its features:

- create multi-layer flipbook animations

1. -variable-thickness antialiased brushes
   

- use DSi camera for stop-motion & time lapse

- rotoscope by tracing on top of camera footage

1. -different layers can have different frame lengths
   

2. -circles, rectangles and polygons (w/ border)
   

3. -translucent color and pattern fill
   

4. -custom palette storage
   

5. -pattern editor
   

6. -individual animation frame timing
   

7. -onionskin
   

8. -6 levels of zoom
   

- export to SD card (SWF, BMP sequence)

1. -work on images up to 9999 x 9999 pixels
   

2. -cut/paste to clipboard
   

3. -rescale clipboard images
   

4. -flip and 90-degree rotate
   

5. -undo
   

With luck, Inchworm will be released on this side of 2011 as DSiWare download. 

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Inchworm is the long-in-development little animation and paint program from Flat Black Films.