Block or allow connections by country address blocks
Pen is a load balancer for udp and tcp based protocols.
Scalable, distributed monitoring system for high-performance computing
SNMP poller for Xymon
IP Monitor notifies you when your public IP address changes
Simple TCP proxy [MOVED to github!]
ARP handler inspection
Network link bonding/trunking/aggregation and multichannel VPN daemon
NfSen plugin to generate and analyze per-IP statistics
UNFS3 is a user-space NFSv3 server
A suite of tools for monitoring GPFS clusters.