Question Tools is a program with a server client that allows the generation of interactive testing. It takes a certain amount of technical knowledge to set up the server, but test generation is easy.
This is a great tool to prepare quizzes, or create practice exercises to help students prepare for exams. It has six applications. Allows you to make interactive multiple-choice, short-answer, jumbled-sentence, crossword, matching/ordering and gap-fill exercises for the Web. It is not an open source.
QuizStar is a user friendly website that allows teachers to easily create web based quizzes and tests. A great feature is that you can time the quizzes, whether that being the amount of time they are able to look at the quizzes, or the days that the quiz is available. For anyone who wants to create online assessment, this site is a must!