IndependentTraveler.com, TravelSmith and Smarter Travel offer free travel packing checklists. Rick Steves' Europe offers a free travel packing checklist specifically for people traveling to Europe.
IndependentTraveler.com offers a list with over 100 items that travelers commonly pack broken down into categories. To use the site, check the boxes of items to bring and create a customized packing list that can by printed, saved or emailed. TravelSmith and Smarter Travel both offer downloadable and printable itemized packing lists.
Rick Steves' Europe offers a detailed, downloadable packing list for people traveling to Europe. In addition to suggesting what to bring, the list suggests the number of each item to bring and states the reason that the item appears on the list.