Depth camera

If you are looking for depth camera for motion sensor the following list will gather all possible specially low cost depth camera:

• Mesa Imageing Swissranger 4000 (SR4000) , probably teh most well-known and expensive. Costs around $9000. Only laboratories buy it, nothing of choice for home developer.
• Kinect from Microsoft
• PrimeSence products that can be sold via Asus/Intel. 
• D-Imager

There are a lot of open souces software that alraedy exist that can work with Kinect (openkinect.org), PeimeSence (opnni.org).So if you consider seriously developing low cost Interactive applications , conside it.

Kinect is XBOX compatible and there is no guarantee that this will work with your PC without some efforts. However there are great help to get at openkinect.org, I have not tried it. Openkinect.org is an attempt to make it compatibe with your PC, however there are other option if you want to develop immediately instead of trying to make any efforts to workaround with Kinect. Asus offer a kit that is compatible with your PC and you can sell Your Creation on asus@vibe that will be available at 

Sell Your Creation on asus@vibe. Once you've developed your application, sell it on asus@vibe online entertainment content store and make some money!