ZipGrade: iOS and Android Grading App For Teachers
GradeYourTest.com
GitHub - Vishal1999-33/Bubble-Sheet-Scanner: Bubble sheet multiple choice scanner and test grader using OpenCV.
GitHub - ylemkimon/formscanner: FormScanner is an OMR (Optical Mark Recognition) software that automatically marks multiple-choice papers. Forked 1.1 from https://sourceforge.net/projects/formscanner/ (http://www.formscanner.org/)