Email and Calendars ... simplified.

Instead of force-fitting an expensive bloated corporate groupware suite into your organization, consider installing Citadel, a free and open source collaboration platform that provides all of the most commonly used features at no cost and with an easy installation:

  • email
  • calendaring/scheduling
  • address books
  • bulletin boards
  • mailing list server
  • instant messaging
  • wiki
  • multiple domain support
  • a powerful web interface

Click here to learn more about Citadel! is an open source software project, staffed by volunteers and producing no revenue. We are not in any way affiliated with eCal Corporation of Philadelphia, PA.