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Basically, through the use of HTTP cookies, it lets you set up a single text file of questions and answers so that any given student will only get any single question once. The questions are presented in a random order out of the list of questions the student has not seen yet. Once an individual has seen all the questions in the database, a message will appear telling the student that they have seen all the questions, and no more questions will be displayed for that student.
Price: Freeware

SFESurvey v1.0 will allow you to create multiple-choice quizzes or surveys online with a twist. Rather than having one correct answer, and multiple incorrect distractors, each possible answer is weighted or assigned a certain number of points. The instructor/test creator can then assign various comments or scores to different ranges of raw scores.
Price: Freeware

WebExam About WebExam WebExam allows you to create your own multiple choice exams on the Web. If you create an answer key database, it will grade the answers submitted by a user and gather all completed exams in a database.
Price: Freeware