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Cognitoedu provides free maths and science revision materials and past papers for KS3, GCSE, and A-level students.

Open-source platform providing engineering calculators for civil, mechanical, and electrical professionals with collaboration features.

Final Grade Calcs provides free grade calculators for students. Its final grade calculator uses a student's current grade, target course grade, and final exam weight to calculate the minimum score needed on the final exam. The site also includes weighted grade and GPA calculators, requires no sign-up, and performs calculations directly in the browser.

Chemistry AI helps high school and university students solve chemistry problems from text, photos, and uploaded worksheets. It provides clear step-by-step explanations for equation balancing, stoichiometry, organic chemistry, acids and bases, thermochemistry, equilibrium, and more.