avaamo - Simple, Secure Business Messaging
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
SupportKit - Embed Zendesk support into your iOS app with 1 line of code
Redmine - Flexible project management web application
Fleep for Business - Simple, open collaboration and chat with admin capabilities
Basecamp - A simple and elegant project management system.