| Mathematics (Open Access Textbooks) | |
| OpenStax Calculus | |
| https://openstax.org/details/books/calculus-volume-1 | |
| https://openstax.org/details/books/calculus-volume-2 | |
| https://openstax.org/details/books/calculus-volume-3 | |
| OpenStax Precalculus | |
| https://openstax.org/details/books/precalculus | |
| OpenStax College Algebra | |
| https://openstax.org/details/books/college-algebra | |
| Book of Proof (Richard Hammack, free PDF) | |
| https://www.people.vcu.edu/~rhammack/BookOfProof/ | |
| Linear Algebra (Jim Hefferon, free textbook) | |
| https://www.cs.ox.ac.uk/files/12921/book.pdf | |
| Physics (Open Access Textbooks) | |
| OpenStax College Physics | |
| https://openstax.org/details/books/college-physics | |
| OpenStax University Physics (calculus-based series) | |
| Volume I (Mechanics) | |
| https://openstax.org/details/books/university-physics-volume-1 | |
| Volume II (Electricity & Magnetism / Thermodynamics) | |
| https://openstax.org/details/books/university-physics-volume-2 | |
| Volume III (Optics & Modern Physics) | |
| https://openstax.org/details/books/university-physics-volume-3 |