Open Source Java Networking Software for Mac

Untangle is a Linux-based network gateway with pluggable modules for network applications like spam blocking, web filtering, anti-virus, anti-spyware, intrusion prevention, bandwidth control, captive portal, VPN, firewall, and more. Visit http://untangle.com

- development stopped! - GATMAN - The first known combination of a network/user administration and a groupware solution - Latest technologies such as JAVA,XML,JSP and strong encryption are used - Modular design, high scalability - Accessible by client an

MailPing monitors SMTP mail hubs and relays from a user's point of view by sending SMTP messages to the servers that it monitors, looking for the messages to come back (and notifies if they don't), and calculates round trip times.

This is a multi-protocol server written in Java that can be extended to support any protocol. Configuration is done through the application interface or through a web based interface. An HTTP web server is built-in. The project is NOT intended for production runs. It was not updated since 2004. The current version was ressurected only as a teaching aid.

Peer Agent is a system that enable a group of users to carry out automated complex interaction via email services without relying on a trusted third party.