Mouse Calc
From Just Solve the File Format Problem
Mouse Calc is a spreadsheet program for the Apple II series that dates to when, for most computer users, the mouse was still an exotic, newfangled device. It is a sister program of Mouse Word and Budget. It was originally released in France as Version Calc.
Mouse Calc was able to read files from VisiCalc, AppleWorks, and the standardized Data Interchange Format (DIF).