This software is well designed and highly customizable
PanQuiz - Create on-line quizzes and assessments
Avanset VCE Exam Simulator - VCE Exam Simulator is a test engine designed specifically for certification exam preparation.
QuestBase - QuestBase is a web-based, cross-platform application that provides everything you need to create and manage your assessments, tests, quizzes and exams.
LearnUpon - Create and deliver online courses to your employees, clients and partners. LearnUpon is the fastest growing learning management system in the world.
Moodle - Moodle is the world's most popular learning management system. Start creating your online learning site in minutes!
Respondus - Respondus is the name of one of the best assessment programs for managing learning management systems.