Lots -- see http://www.slipstick.com/addins/housekeeping.htm

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
> I've tried compacting my folders, but I still have a 1G PST file, and my
> performance is terrible. Do you know any utilities which will remove
> attachements from, say, my Sent Items folder to try to get the size down?
>
> Thanks!