I didn't catch the thread, but I have been looking into this very question:

Here are some popular favorites:
http://www.neo-direct.com/intro.aspx
http://www.quickpad.com/
http://www.calcuscribe.com/

If you do up a spreadsheet for pros/cons, please publish it here, or a link to it here. I haven't tried any of the above, so that's as far as I go!

Love and More Love,
Grinity

Coaching available, at SchoolSuccessSolutions.com