From Cimple Systems:
The Teacher Gradebook Calculator is designed to help teachers on all levels ease the burden of calculating their students' averages. It's meant to replace your calculator, not your gradebook. You can mix numeric and letter grades, drop the lowest grade within categories, give grades more or less weight, determine which grades will affect the final grade, generate HTML reports, and color-code grades. This version adds many new features, including personal information, mass enter grades, and the ability to print reports for selected students.