Xymon monitors your hosts, your network services, and everything else.
Open source monitoring system and time series database
An eye on your system
Command line tool for managing Amazon S3 and CloudFront services
Advanced Network Neighborhood Browser and Samba Share Mounting Utility
FreeBSD Multi PPP daemon
A P2P filesharing client which connects to the Gnutella network.
The Free & Popular opendhcp application for Physical & Virtual Machine
Amateur Radio AX.25 chat and PBBS program using Linux's AX.25 stack
free netflow analyzer
Serial <-> TCP/IP, Serial <-> UDP/IP, TCP/IP <-> UDP/IP
Pure Java Network Tools
Delay-Tolerant Networking suitable for spacecraft and ground
Java-based ONC/RPC implementation
Bringing intranet on the internet with Zero-Config Mesh VPNS.