Roundcube - Web-based IMAP email client
DigitalChalk - Online Training Software and Learning Management System (LMS)
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Workplace by Facebook - Connect everyone in your company and turn ideas into action.
Rainloop - RainLoop is a web based email client.
Onehub - Onehub helps businesses securely share and control files in the cloud.