THUNDERBIRD - FEEL THE THUNDER

Mozilla Thunderbird, a free and open source software that can be used for email and news transactions, has been developed by Mozilla Foundation. It is a great tool to manage your emails, as it offers a good number of useful features. The features include better search option and email archiving; you can also open your mails in tabs just the way you open new tabs in Mozilla Firefox.
It is cross-platform software, hence runs on Windows, Linux, Mac and others. For more information visit http://www.mozillamessaging.com/en-US/thunderbird/