RendezvousProxy is an application that allows you to proxy Rendezvous/mDNS/Zeroconf service announcements across subnets. This is ideal for users of Apple's iTunes, who wish to connect to their home shared music from alternate locations (e.g. from the office).
Alternatively it can be used to create Rendezvous/mDNS/Zeroconf service announcements for services that do not have this functionality built-in, e.g. a user could announce a Rendezvous service for a corporate Web server, which would automatically appear in the Rendezvous bookmarks in the Safari Web browser.