Cross-platform multi-protocol VPN software
Manage port forwardings via UPnP
Advanced Network Neighborhood Browser and Samba Share Mounting Utility
Pure Java Network Tools
Amateur Radio AX.25 chat and PBBS program using Linux's AX.25 stack
A library for blocking access to network on-the-fly
FlowViewer is a web-based netflow data analysis tool.
The Free & Popular opendhcp application for Physical & Virtual Machine
Online port scan scraper
CORBA Server Monitoring service
OWASP ModSecurity Core Rule Set (CRS) Project
The open source grid computing solution
Pen is a load balancer for udp and tcp based protocols.
Extract and Convert Juniper Firewall Policies to CSV
Various TCP/IP servers, clients and network management tools
Econet Fileserver (using AUN)
simple local dns that either answer query or forward them
A simple packet sniffer for local networks