Gradekeeper Single License Cost: $20 Get the full version     Trial version     Developer's Website Contacting third-party download site please wait. If your download does not start, click here, or get the full version Descriptions Gradekeeper Single License: Gradekeeper is a powerful gradebook application for Windows and Macintosh. A single license allows you to use both the Macintosh and Windows versions of Gradekeeper both at home and at school. Please enter your name in the Register To field.