Sum Fun - A fun number puzzle game for iPhone and iPad.

globalquiz.org - Difficult, multiplayer and multi-language trivia game.

Sum - Simple Maths Puzzle - How fast can you add two numbers?

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.

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

JetPunk - JetPunk is the biggest online quiz platform that contains sports, geography, music, movies, and more regional or international information and database, created by H Brothers Inc.