Firefox OS, codenamed 'Boot 2 Gecko' is a fully web-based open mobile OS by Mozilla that will take on the smartphone market.
  

Nokuntu is an application  for managing Nokia phones on Ubuntu. It is similar to Windows Nokia PC Suite,  It has a simple and easy to use user interface that combines many functions like managing media files, synchronization, sending SMS, sending files via Nautilus, share your PC Internet connection via Bluetooth on your phone, check battery status of your phone, auto detection of USB/Bluetooth connections, etc.

Here are some of the main features about Nokuntu explained in detail

Red Hat Asia Pacific Pte Limited - mobile application. News, events, video, blogs, case studies delivered to your handset.

Featuring server-side configuration and content managed in a simple Drupal web site, hosted on a free Red Hat Openshift Express server.

Developed by Gary Marshall for Red Hat Asia Pacific.

Mozilla Foundation today officially announced the launch of its new Mobile OS platform called Boot to Gecko (B2G). For all those who want to know how B2G is different from other Mobile Operating Systems such as Android or iOS, B2G is the Chrome OS of the mobile world and is ofcourse open source. Mozilla called its new in-house wonder  "Web as the Platform for the mobile devices". B2G will be able to run any web application just like Chrome OS, so if you are a web developer and already developing web apps you don't need to do anything new, your app will be ready to run on B2G as soon as B2G is in the market.

Opera Mobile 11.5 is the latest version of Opera Software’s browser for mobiles and tablets. Its a touch friendly mobile browser for Tablets or Tablet PC computers, the Linux version  for the browser is originally released for Meego based Tablets and Tablet PCs.

Opera Mobile is Flash capable; comes with Opera Link – a bookmark/speed dial/notes synchronisation service -  and Opera Turbo – a web page compression service using Opera servers that reduces  bandwidth consumption by up to 80%. (So its a must have if you have slower Internet connections while roaming).