Got a neat little program for you: SCOPE.
The abstract from the page:
“This program calculates values for telescopes and oculars. You start the program, add a telescope and then as many oculars as you want. You can then view several values for the telescope as well as the details for each ocular when used with this telescope. You can also save the data set (telescope and oculars) to an XM file or retrieve a file saved earlier. You may add new oculars as needed to a retrieved file and save it anew.”
Before you start jumping with joy, take it for a ride and tell me what you think. Miss anything in there? Want it to do some other things? Like make a cup of coffee for you? Just slip me a note and will see what I can do.