iExplorer (formerly iPhone Explorer) is an app which allows you to:
- retrieve photos easily from your iPhone/ iPad / iPod Touch
- use the iPhone (etc) like an external flash drive
- browse files and folders on it
- delete sensitive items before giving the phone away
Just download the app to a computer, then plug in the device. This program even works on Windows as well as Mac!
A few years ago it was free, but no longer. Licenses are $35, 2 for $50 or 5 for $70.
A free alternative which requires OS X 10.8 (Mavericks) to run is MacGo iPhone Explorer.