I needed a conversion application to be able to enter spreadsheet information from Excel to Quickbooks Desktop. I found this one, and it does the job, but it's not that easy. I had to try it several times (in a test company thankfully) to see exactly where and how things post. It has a lot of columns which I didn't need (some people will) and it's really basic.
On the positive side though, it works, and it's not expensive. So thank you!