BIRD
BIRD is an open source implementation of a TCP/IP routing daemon for Unix like systems. It supports both IPv4 and IPv6, multiple routing tables, and a BGP, RIP and OSPF routing protocols, as well as statically defined routes.
Quagga
Quagga is a network routing software suite providing implementations of Open Shortest Path First (OSPF), Routing Information P ...
XORP
XORP is an Internet Protocol routing software suite. It provides a fully featured platform that implements IPv4 and IPv6 routi ...
FreeRouter
freeRouter is a routerOS process. it means freeRouter speaks routing protocols, and reencapsulates packets on interfaces. (a h ...
ExaBGP
exabgp - The BGP swiss army knife of networking. Unlike BIRD or Quagga, ExaBGP was not designed to transform a general purpose ...