Databases
- Directory of Open Access Journals
DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals. DOAJ is independent. All funding is via donations, 40% of which comes from sponsors and 60% from members and publisher members. All DOAJ services are free of charge including being indexed in DOAJ. All data is freely available.
- OpenDissertations
Open access dissertations compiled by EBSCO, which includes its own product American Doctoral Dissertations, as well as dissertations and theses contributed by various colleges and universities.
- ArXiv.org
Open access to 1,438,197 e-prints in Physics, Mathematics, Computer Science, Quantitative Biology, Quantitative Finance, Statistics, Electrical Engineering and Systems Science, and Economics
Open source textbooks
- OpenTextbook storeA list of downloadable textbooks in mathematics.
Courseware
- Memrise courses in computers and engineeringShort courses, primarily about coding.
- MyOpenMathCourses in pre-algebra, algebra, pre-calculus, and trigonometry.