Sparkle Xp

SparkleXP is an application designed to tweak Windows XP and improve its performance. It helps free up computer resources resulting in a faster and more responsive system. This tool creates a second "Hardware Profile" and a new user to get a lightweight, speedy desktop. You can choose to boot into your standard or SparkleXP configuration at startup.

http://www.sparklexp.com/

Sync Server

This utility makes an exact replica of files on a machine via the network to another machine. It was designed for load-sharing situations where all the servers need to have a copy of all the files, but can also be used for other situations. For example, to publish files from a development machine to a production machine, or to have a backup server standing by that can immediately take over without first having to restore from a backup.

http://www.kessels.com/SyncServer/index.html