Home Inventory: track your belongings, have peace of mind
The program is easy to use: create rooms to organize your stuff and then add items to each room. For items, you can add information like purchase price/location, serial number, make, and model. You should also add a picture of the item in your house (not just from the manufacturer website), and a scanned receipt proving you paid for the item.
You can print your entire inventory room by room, export to .csv, or save to the Vault24 service (a secure, offiste backup service offered by the makers of Home Inventory). If, for instance, a fire takes your home (and you've been good and backed up your Home Inventory files offsite), you can make life easy for yourself and the insurance people by providing them a complete, organized inventory of all of your significant belongings.