Getting Started with 3d Scanning
I 3D scanned my dog Coco using 123D Catch (free) and my iPad mini. I then used Meshlab to reduce the poly-count and clean the model. Last step was to upload the result to Sketchfab (you need a WebGL supported browser to view the embedded plugin properly).
Another interesting solution is Skanect Pro + Structure Sensor (500$) for 3d scanning using a depth sensor.
For other scanning apps, I recommending reading 30 tools to make a 3D scan