1. Collaborate for free with online versions of Microsoft Word, PowerPoint, Excel, and OneNote. Save documents, spreadsheets, and presentations online, in OneDrive. Share them with others and work together at the same time.

  2. Gaggle Mail is a simple and easy to use email list manager.

  3. Bringing the Gmail & Google Inbox experience to your desktop in a neatly packaged app

  4. SOGo is groupware server with a focus on scalability and open standards.

  5. Free, open source and cross platform messaging and emailing app that combines common web...

  6. Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online

  7. Your right to privacy. Simplify your life with eclipso, the safe & central place to organize and share your emails, photos, files, contacts, calendar events and more.

    freemium €1.0 / Monthly (eclipso Connect, 20 GB, IMAP, Ad free)

  8. Firebase is a cloud service designed to power real-time, collaborative applications for mobile and web.

  9. Fully managed pub/sub messaging for microservices, distributed systems, and serverless applications

  10. Horde Groupware is a free, enterprise ready, browser based collaboration suite.

  11. Secure premium email service with mobile sync apps for calendar, contacts, tasks, notes and FISMA compliant email archiving.

  12. Show you are in business and look professional with custom email at your company domain.