From Pescados Software:
Entourage Browser is a simple and intuitive application, which will help you to perform some basic operations in Microsoft Entourage, such as saving attachments to your disk, preview its contents without opening the whole message or backup your selected folders (by hand or programatically).
You can preview and delete your messages without opening them.
You can save attachments to your disk on-the-fly.
You can backup manually or programatically selected folders using several formats.
Entourage Browser supports POP, IMAP and Hotmail accounts.