XOBNI

If you are user of MS Outlook, that's too bad.  We have standardized on it within our corporation, as many, many others have done.  Selling our souls to the devil incarnate in Redmond.  Oh well.

Anyway, if you are a user of Outlook and you deal with a lot of emails and  need to find emails, attachments, connections between people and organize around all those things then XOBNI (inbox backwards) is for you.

XOBNI lets you look at your email organized around people, not information.  Use it to see a threaded version of your conversations.  In that thread, you can also see who else participated.

Try it.