Sysinternals Suite :
http://technet.microsoft.com/en-ca/sysinternals/0e18b180-9b7a-4c49-8120-c47c5a693683.aspx
Includes:
BGInfo – displays configuration, such as its name, IP address, or operating system version as a desktop wallpaper
ZoomIt – screen zoom and annotation tool for technical presentations
ProcessExplorer – displays which program has a particular file or directory open