Sketch Maps is drawable map which can also be saved to pictures. It's that simple, but unique idea.
Tuukkas latest game is also available
You can use QR Code in Windows Phone / Bing Search / Vision for direct download:
You might also be interested in other unique products from Tuukka Salonen:
- Draw & write over live images from device camera and save to pictures (Windows Phone)
- The ultimate Microsoft exam visualizer in cloud