iOS: iOS’s default photo management app is well-regarded, but fairly bare bones. If you keep several years’ worth of photos in your camera roll, Photowerks is a must-have app to make sense of them all.
NOTE: This app directory entry guide has been superseded. Click here for the most recent version. There aren’t many Mac photo management apps that aren’t somewhat specialised, but among the few we think iPhoto is the best for its simplicity, rich feature set, and good integration with popular online services.