Free PDF viewers

In a previous post, I was looking at how to access the Adobe PDF ocx control within Progress. It appears that control is only available if everyone is updated to version 9 of Adobe (another developer in the office wasn't and didn't have the control).

While it's not impossible for us to get the clients up to that version of Adobe, the other concern appears to be that eventually we are going to need a way to read data from a particular PDF file and take that data and insert it into the database. The Adobe control doesn't appear to do this from what I can tell (if it does, could someone show me how?)

Anyways, we decided to start looking at some free PDF viewer/readers out there that we might be able to use to do both of these things. But we also need to make sure that anything we use can also be accessed by Progress.

Has anyone had any experience with a free control like this (or maybe one that has a small cost to it)?