If you're looking for a simple way to catalogue your piles of movies, music, books, games, and software GuruLib is a handy tool for cataloguing them all in the same place.
GuruLib is bursting with features in comparison to many cataloguing websites. Not only can you set up a personal library for everything from your movies to your software and just about every media type in between but doing so is extremely easy. You can search by title, plug in the UPC/ISBN number, or even use your webcam or mobile phone camera as a barcode scanner. There are wish lists and loan tracking tools to keep tabs on who has your stuff. GuruLib has widgets galore, you can set your library up as a cover-flow style screensaver, share your library with a Facebook plugin, create RSS feeds and integrate your Amazon habits into your library with a bookmarklet. Just as welcome as all the cool tools is the ease with which you can import and export data into GuruLib. If you have your own favoured tool for tracking your stuff, let's hear about it in the comments.