GateD is a router which supports most common Unicast routing protocols, including RIP, OSPF, and Router Discovery. The ipv6 version also supports RIPng and BGP-4+.
Gatedaemon. A program which supports multiple routing protocols and protocol families. It may be used for routing, and makes an effective platform for routing protocol research. The software is freely available by anonymous FTP from "gated.cornell.edu". Pronounced "gate-dee". See also: Exterior Gateway Protocol, Open Shortest Path First..., Routing Information Protocol, routed. Source: RFC1983