ManageEngine RecoveryManager Plus - RecoveryManager Plus is one such enterprise backup solution which has the ability to easily backup and restores both the domain controllers and virtual machines.
Roundcube - Web-based IMAP email client
Heroku Enterprise - Heroku Enterprise is a flexible IT management for developers that lets them build apps using their preferred languages and tools like Ruby, Java, Python and Node.
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
SECDO - SECDO offers automated endpoint security and incident response solutions
Mailpile - Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features.