Gradecam - Versatile app that makes it easy to assess students and import into your gradebook.
LearnBoost - Terrific resource for your online gradebook. Organize your class and schedule in their easy-to-use format.
Super Teacher Worksheets - Excel sheet with for student’s grades.
ThinkWave - Online Grading book. You must make an account but it’s free for teachers.
Jason Ritchie - How to use excel as your gradebook, including using statistsics.
EasygradePro - Popular gradebook used by teachers and school districts.