ServicemarX allows you to easily discover, bookmark, and share network services. It extends Bonjour (formerly known as Rendezvous) by expanding its scope Internet-wide. ServicemarX also enables Tiger's Wide Area capabilities. (full source in CVS below)
The Project tries to reduce the network bandwidth required for installing application. The micro-install project is an install program for Linux(Debian/Ubuntu/Cent OS/Gentoo/), Solaris, Mac OS X.