Last edited by PrePress_Man; 06-26-2011 at 10:01 AM. Reason: add [CODE]
Not a program, but there are LabDotGainCalculator1 and LabDotGainCalculator2 spreadsheets in zip and sit archive you can download. Access the page by clicking the Spreadsheets word on left side near horizontal dividing line. Hopefully this method is standalone enough for your needs.
Let the blessing brings bounty for you.
Another dot gain calculator (in russian):