Anti-Spam SMTP Proxy Server implements multiple spam filters
OpenDDS is open source publish/subscribe middleware
Booking/reservation of meeting rooms/equipment with e-mail invitations
software for email automation (newsletters, transaction mails, etc.)
Web based live video streaming from webcam.
Multiplatform Ham Radio APRS and Mapping Program
A simple yet powerful open source VPN solution
The IRC's Talking Robot
Free Web-based MeetMe GUI.
This is a php script that runs outside Drupal to send your Simplenews
ForChat is a union between chat-room and message board (forum)
A faster version of Xoops optmized for speed
The leading Open Source survey tool