The ViewPoints Project is a collaborative multimedia project created by faculty from the Five Colleges of Ohio which presents videos of native speakers elaborating on a variety of topics including culture, religion, and travel. Access these videos through the Foreign Language Digital Videos database.
Duolingo is a free online language learning program. Also available for iOS and Android.
The German Language in the Digital Age by 
Elements of German: Phonology and Morphology by 
German with Ease by 
Deutsch Heute by 
Hammer's German Grammar and Usage by 
Learn German in a Hurry by 
Neue Horizonte : a first course in German language and culture by 
