http://www.expertsgalaxy.com - Android is one of the most famous Linux OS, which people don't know. It is a Mobile OS based on Linux and customized by different companies. I have been using an Android phone for around 3 years now and quite happy to make a switch being an Open Source Supporter. There are so many free applications available to make the phone more smarter, however all of them are not worth installing. Many of them are useful, then also we can't install them because of the limited capacity of our phones.