We have started our open source process this month and released iOS and Android (see Roadmap in Github). The product however has been in the market from Jan 2012. You can try it out from all the market places
iOS - https://itunes.apple.com/us/app/mowbly/id606846482
Android - https://play.google.com/store/apps/details?id=com.cloudpact....
Windows - http://www.windowsphone.com/en-in/store/app/mowbly/69e09a71-...
Blackberry - http://appworld.blackberry.com/webstore/content/26236875/
We have even been tweeted by the Firefox team for the Firefox support http://4.bp.blogspot.com/-EHi3NJRtiO8/UYJJ5P3TGeI/AAAAAAAAAB...