Linux Router Project A networking centric mini-distribution of Linux. http://www.linuxrouter.org/
GNU Zebra Supports BGP-4, RIPv1, RIPv2 and OSPFv2. http://www.zebra.org/
Cayman Systems Manufactures a broad range of internetworking and remote access solutions. Our products include remote access servers, an integrated multiprotocol router and hub/router; Ethernet-to-Ethernet router; and LocalTalk-to-Ethernet routers. http://www.cayman.com/
Riverstone Networks Provides carrier-class switches and routers for mission-critical networks. http://www.riverstonenet.com/