My favorite open education site. Videos can be viewed or downloaded at varying qualities, plus audio download, and transcripts.
While primarily targeted to K-12, there is a great deal of material that works for college applications, from statistics to language to history. Provides videos and transcripts. Navigation leaves a little something to be desired and transcripts are hidden.
Provides all the content of the course except audio or video.
A catalog of online courses, but most have required registration (even if free), or take place during a specified time. Yale is the best for student use anytime.
I excluded Harvard and Berkeley because the bulk of their material is no longer free, easily available, full courses, or any combination therein.