AtMail is an open source webmail client written in PHP. They aim to provide a elegant Ajax webmail client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface.
The open source version of AtMail provides users with a lightweight, yet powerful webmail client. The software can be installed on a variety of platforms with ease and without the hassles that most webmail platforms impart. Traditional desktop mail clients are in decline; the future of email is via a web interface. AtMail is poised to deliver the next generation in Open Source Webmail.
License: Apache 2.0 Open Source License