The following is a (really old list) of programs you can use with Outlook. I've used them all at one time or another. I wasn't planning on moving this list to the new site as I have no plans to add to it or update it, but it gets enough hits each day that it's not going to be a dead page anytime soon.
Some of these utilities are free, others are shareware and well worth the investment. They all work with current versions of Outlook. If you want to see more utilities for Outlook, slipstick.com has the largest list of Outlook and Exchange utilities on the Internet.
Auto-Mate – Uses rules to move mail from your Inbox (or other folders) based on several criteria, including the age of the message (as in hours, days, or weeks later).
Attachment Options — Works with Outlook 2000-SP3 and newer, allows you to configure the attachment blocking settings from Tools, Options. Written by Ken Slovak.
Extended Reminders and Reminder Manager — Get reminders on items in any email, contacts, tasks or calendar folder in your default mail store. Reminder Manager works on all message stores in the profile. Written by Ken Slovak.
PocketKnife Peek — Free Outlook add-in for screening your e-mail as plain text before opening it.
OutlookSpy — A must have for developers. Replaces or supplements mdbvue.exe utility.
MFCMApi — Replaces or supplements mdbvue.exe utility and unlike OutlookSpy, does not require installation. Great for end-users and administrators who need to view the internal workings of a datafile on occasion.
DocMessageClass — A free utility to change the forms used on Outlook items.
KnockOut — Free Utility for your system tray. Use it as a visual reminder to see if Outlook or Word is running in a hidden state and close them using Knockout if they are. Also provides shortcuts to create new Outlook items.
Published June 20, 2011. Last updated on June 16, 2017.