The Hitchhiker's Guide to the Galaxy ScreenSaver 

This Hitchhiker's Guide to the Galaxy screensaver present images, characters (Arthur Dent, Ford Perfect, Zaphod, Marvin...) and scenes from the movie in a high quality slideshow with animated effects. Don't Panic.
flash screensaver builder hhgttg dont panic hitchhiker douglas adams arthur dent ford perfect zaphod marvin vogon trillian 42 movie

HashTab 

A windows shell extension which installs a new tab with file hash information. Includes MD5, SHA1 and CRC032. Also allows for easy hash comparison. Great for verifying downloads without requiring any external tools.
shell hash crypto cryptography windows file md5 sha1 crc crc-32 extension