FlashBag

FlashBag is a lightweight, fast, and easy-to-use app that helps you to organize your bags.

After making and naming a bag, you can add pockets, and both can be named to meet your exact needs. You can add a list of items to each pocket, and from the main page, all bags can be searched by the name of the item you're looking for. If matches are found, you'll be told which bag any matches can be found in, as well as which pocket, so you don't need to spend so much time burrowing through 3 bags and every pocket in them.