AtMail, originally created in 1998, was of the first web-based mail solutions that was created as an alternative to Microsoft’s Outlook. Since then, it’s undergone four incarnations with latest taking on a Web 2.0 face with a simple and intuitive interface. And now, there’s an open source version available for users who want the same easy to use, feature rich webmail but for free. AtMail is written in PHP, has a lightweight Ajax interface which makes it faster, and includes videomail and IMAP support. If you’re familiar with Outlook or the commercial version of AtMail, this will have the same look and feel and it doesn’t cost a thing to use. Just download and get busy.