HoDoKu - HoDoKu is a sudoku helper written in Java and available in English and German.

HugeQuiz - test your knowledge with a variety of quizzes about everything.

Yasminoku - Sudoku game and solver totally written in DHTML.

The Quizopedia - The Quizopedia is a top-notch quiz-based application that provides the overall development of the interesting candidates by offering interesting quizzes focused on enhancing analytical, reasoning, and decision-making skills.

Simple Sudoku - Freeware Sudoku Puzzle Maker and Solver

AlltheTests - AlltheTests is an online platform for testing intelligence and command over current affairs, including Cartoons, Mangas, Books, Games, Satire, Knowledge, EQ tests, Social media, Sports, and celebrities’ related tests.