Email

phpList is an open-source newsletter manager. Phplist is free to download install and use and is easy to integrate with any website. Phplist is downloaded more than 10000 times per month.

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.