I use Mile Tracker, have been for years, it is now a service offered through USA Today travel, but what I like about it, is all the information ie. account numbers, pins etc, stays resident on your computer and it goes out to the websites and checks all your accounts at once. I believe I have almost 100 accounts I manage with it, for myself, my husband and my extended family. The one thing they could improve on is the earlier mentioned expiration dates, which is getting a little more difficult now that some expire in 18 months, but I use a spreadsheet to keep up with those.
Cindi