You can make your own courses with eXeLearning with audio, video, quizzes and games; then use them on almost any mobile device! Supports Java 2 Micro Edition (feature phone Nokia, Samsung, Alcatel, LG, etc) Android, iOS, Blackberry, Windows Phone.
Tools to support the learning of the C programming language
CLUE (C Learning Undergraduate Environment) is a software allowing students to work on assignments in the C language while benefiting from support for peer testing, hyper-linked tutorials to help them understand compiler error messages, detection of "novice errors" with warnings hyper-linked to tutorials. Sponsored by National Science Foundation under award CCLI #0836863.