XORP is the eXtensible Open Router Platform.

XORP currently provides a set of routing protocol
implementations, an extensible programming API, and
configuration tools. The supported protocols are BGP, RIP,
PIM-SM, and IGMP/MLD. IPv4 and IPv6 are both supported. The
list of protocols and features will hopefully grow as more
people start contributing to the project.

At the present time, XORP does not implement its own forwarding
system. It is reliant on the forwarding of the underlying host
operating system. We would like to support forwarding in custom
hardware and software architectures in future. An example being
the Click modular router.

Authors:
---------
 * Fred Bauer
 * Andrea Bittau
 * Javier Cardona
 * Atanu Ghosh
 * Adam Greenhalgh
 * Mark Handley
 * Orion Hodson
 * Eddie Kohler
 * Pavlin Radoslavov
 * Luigi Rizzo
 * Bruce M. Simpson
 * Marko Zec