Quagga is a routing software suite, providing implementations of
OSPFv2, OSPFv3, RIP v1 and v2, RIPv3, BGPv4 and experemental ISIS
for Unix platforms, particularly FreeBSD and Linux and also NetBSD,
to mention a few. Quagga is a fork of GNU Zebra which was developed
by Kunihiro Ishiguro. The Quagga tree aims to build a more involved
community around Quagga than the current centralised model of GNU Zebra.

WWW: https://www.quagga.net/