I second that question. I've been searching for a while and haven't found anything yet that does the same job. (Still on NUTDC 5.3x but bought license for NowX early on).

The issue we will face is how to get that linked contact and appointment/task data out of NowX or NUTDC and into something else. This issue has held me hostage for some time. (I also started with NUTDC over 15 yrs ago!)

This is probably too much to ask for but I'll post it anyway. Please add to the original request:

ability to read/import/export linked contact data