Routed

routed is the routing daemon included with the base FreeBSD system. It's getting a bit long in the tooth, and most people seem to recommend zebra as a superior alternative to most routing needs.

Note: you don't actually need a routing daemon for simple gateway operation; you only need a routing daemon if you have 3 or more network interfaces and you need to be able to discover the optimum interface to use to reach a given destination dynamically.

see also: gateway, zebra