Quagga is a routing software suite, providing
implementations of OSPFv2, OSPFv3, RIPv1 and v2, RIPng, IS-IS,
and BGP4+ for Unix platforms, particularly FreeBSD,
Linux, and NetBSD.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release mostly features bugfixes and cleanup work. Around 30 patches have been merged since the last release. This version is recommended for all users of the 0.99 branch.