Here is a nice program i found that is tottaly free, and continually being worked on. Its a tool so you can catalog all of your DVDs or in my case all my DIVX backups i have plus my main movies.
http://www.coollector.com/
Download it but beware vista users, you might have problems with the program at times. So i suggest you always right click the program and run it as a admin. This will eleviate problems. I would also suggest that vista users backup the main collection file found in the collectoin folder. This will insure if there is a issue with a update that you will not lose your collection info.
The program is nice because it allows you to rate your movies, and loan them out. Then you can print lists based off ratings, owned, loaned ect... The program is simple and very easy to learn. So if you have alot of movies, or for those who want to find movies and get prices on them this program works well.
They currently are talking to amazon and a few other sites to have their prices listed, but the current place they use has turned up to always be lower then amazon. And please if you purchase from the site, use the program to get the proper page for purchase, as they get awarded a slight amount of money from the site so this will help keep the program free forever.