Education
Open Culture
cultural & educational media collections
Open Educational Resources Commons
Creative Commons licensed teaching and learning materials
Research
Archive.org
non-profit library of millions of free books, movies, software, music, websites, and more
Archive-it
collecting and accessing cultural heritage on the web
Encyclopedia.com
Concise Columbia Electronic Encyclopedia
Wayback Machine
archived snapshots of the web
Academia.edu
20m full-text papers
Figshare
academic cloud data storage