Chromium The open-source project providing the code for Google Chrome. Chromium Updater will automatically checks for the latest available version and installs it on your system, so you don't need to manually update periodically.
Mozilla Released Firefox 4 Beta 1 about three weeks ago this month, recently Firefox 4 Beta 2 Released with App Tabs and 23 Languages for Mac. App Tabs offer a better way to manage tabs, saving space on the tab bar and making it easy to find frequently used tabs also it support for new CSS3 features like Transitions and Transformations.
Mozilla Thunderbird 3.1.1 released with new features. Thunderbird support IMAP/POP, Rss reader, FTML mail, quick search, manage multiple e-mail and news group accounts and many more.
Firefox 4 Beta 1 is now ready to download and test! This first version gives an early look at what’s planned for Firefox 4. Stay tuned, because there is more to come and plan to release new beta versions every two to three weeks. Firefox 4.0 comes with a new add-ons manager and it's still lacks behind speed wise in most browser benchmarks.
Opera development team has finally released the version of Opera 10.60 web browser for Windows, Mac OS X, Linux. Opera 10.60 has been enhanced for supports advanced Web standards such as HTML5 and WebM video. Opera 10.60 faster web browser on earth?further-optimized JavaScript engine which is 50% faster than Opera 10.50.