SynchPst for Outlook 

SynchPst - the easy way to synchronize data among two personal folders. Just choose either single or multiple folders/subfolders to synchronize. Synchronize all Outlook items including notes and distribution lists. Deletions are supported, too.
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Aid4Mail 

Migrate emails to another mail client, export them for viewing in IE, Excel, or a database, and archive them to save space or for compliance with legal requirements. Supports many mail clients and processes all messages without losing any information
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Genie Outlook Backup 

Backup all your Outlook data to virtually any storage media; Settings and Control Information, Outlook Custom Forms, Internet e-mail Accounts, Outlook Options Settings, signatures and stationary, Favorites, Windows Address Book, IE settings.
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ABF Outlook Backup 

ABF Outlook Backup is a backup and synchronization tool for MS Outlook. It allows you to backup and restore your messages, address book, settings, accounts, message rules, junk email lists, signatures, and even your Internet favorites.
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