iOS: Journals aren't always easy to keep -- simply remembering to write about your day is often hard enough. Heyday is an app that does a lot of the work for you automatically. It brings in every photo you take and their locations to create a journal for you.
Heyday's pretty simple, but it works well. Just launch the app and it automatically imports your pictures, videos, and the location data from them. You can then drop in notes about what you were up to if you want, or just leave it as a photo map. Heyday is private, so all your data is just kept on your phone and you don't have to worry about sharing it with others. If you've been looking for a simple way to get into keeping a journal, Heyday's worth a look.
Heyday (Free) [iTunes App Store]