hackattic - No nonsense, real world programming challenges
ALEKS - ALEKS is a web-based artificially intelligent assessment and learning system that uses adaptive questioning to accurately determine exactly student knows.
HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
ExamView Assessment Suite - ExamView lets you can create assignments, launch classroom assessment questions and collect real-time responses to evaluate student performance.
Takehome - Effective and humane coding challenges for candidates
iSpring QuizMaker - iSpring Quiz Maker is easy-to-use quiz software. Create interactive quizzes and surveys in HTML5 & Flash and embed them in a website or publish for any LMS!