Network Operations Center
AFNOG - African Network Operators Group, NANOG - North American Network Operators' Gro, NOC List by Jared Mauch, NordNOG - Nordic Operator Group, SwiNOG NOC Contacts, What is a NOC?
CIPE
An ongoing project to build encrypting IP routers. Software is already available for Linux and released under GPL.
GNU Zebra
Manages TCP/IP based routing protocols. It supports BGP4 (RFC1771), RIPv1, RIPv2 and OSPFv2. Zebra makes use of OS threads where available.
Unofficial GNU Zebra FAQ
GNU Zebra documentation, not included into releases, but useful and up-to-date. General dynamic routing info included.