iTest is the best online quiz and examination app. It allows educators to create, share, and manage quizzes and exams with a high degree of convenience and flexibility.
Demo: https://codecanyon.net/item/itest-complete-online-examination-system/20620179
Quizzy is full featured online test and quiz platform built on codeigniter 3, Quizzy is a highly scalable and powerful Online Exam System to manage categories, quizes and multiple choice questions.
Demo: https://codecanyon.net/item/quizzy-online-examination-platform/27941288