$10; free with newer iOS devices
Evernote is great, but some people prefer planning trips with apps they already know and use, such as Apple's Numbers spreadsheet program. Among this gorgeous app's templates is "Travel Planner," which includes worksheets for "Itinerary," "Reservations" and "Packing List." You can add photos and additional tabs as needed. The worksheets are linked, so that items you add to the Reservations worksheet also show up in your Itinerary. Plus, using iCloud, your travel planning spreadsheets sync across your iOS devices, Macs and with iWork.com.