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Roundcube - Free webmail for the masses. Roundcube webmail is a browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an e-mail client, including MIME support, address book, folder manipulation, message searching and spell checking.
RoundCube is an open source webmail platform that allows you to perform virtually every task you could want with your email. Some people compare it to the business email services that you can get from gMail, except for the fact that it is free. The platform is designed to be easy to setup and use on all the standard web servers (Linux, Apache, MySQL and PHP). It comes installed in cPanel in most cases, but even when that is not the case you can have it installed in just moments. In addition to providing you an interface for reading, sending, forwarding, replying and deleting normal email messages, RoundCube also makes it easier to keep your messages better organized. The system even includes options for multiple signature lines, which is nice for people who like to customize their responses based on who they are sending things to. While there isn’t anything groundbreaking with RoundCube that you can’t find with other webmail platforms, it does get the job done well without any trouble.