iOS: If you travel a lot, or just worry about leaving things behind when you do, iPacking might be just the app you need for creating your packing lists.
iPacking lets you create and save multiple packing lists for different kinds of trips and even specify which items go in which piece of luggage. You can make your list using a built-in catalogue of items or just type them in as you go. iPacking also includes templates for common types of trips (such as business, family and camping trips) that you can customise as you see fit. When you're ready to pack, you can view or print your list, or have iPacking walk you through the packing process one item at a time so you're sure to get everything.
iPacking ($1.99) [iTunes App Store]