Nokia N900 runs Ice Cream Sandwich

Android: Android is the mobile operating system from Google. The software was originally built by a company called Android Inc, that was purchased by Google in 2005. From its modest debuts, Android has become a powerhouse that powers not only smartphones and tablet, but a host of other less high-profile devices and gadgets. Although Android is not a community-driven project, Google does release the source code as open-source under the Apache license. You can follow Ubergizmo on Android with Google Currents. 

Nokia: Nokia is a Finnish communications company that was the largest phone vendor (per unit) between 1988 to 2012. The company's history go back to 1871 but the Nokia that we know today (the Nokia corporation) was founded in 1967 by the merger of three Finnish companies. It is then that Nokia worked on networking equipment and was ultimately involved in the launch of the first cellular network in 1981 (Mobira Oy). Nokia because a key developer of GSM, the standard that we all know today. Although Nokia still produces a range of phones that includes entry-level handsets and Symbian smartphones, the company is counting on the Windows Phone OS to regain the share that it once had. The current flagship Windows Phone device from Nokia is the Lumia 920.