A Guide for Educators and Learners

- AMS Open Math Notes"A repository of freely downloadable mathematical works hosted by the American Mathematical Society."
- OpenOregon WeBWorK-MathBook XML Bridge ProjectThis project aimed to build inter-connectivity between two powerful open resources for mathematics education. The work makes it possible for an open textbook author to simultaneously use MathBook XML software to write their book, while using WeBWorK to write interactive example and homework exercises.
- Scottsdale Community CollegeMath blog providing a list of open and shareable resources and tools.
- Shodor Foundation MASTER Tools"MASTER Tools, developed by The Shodor Education Foundation, Inc. are the result of on-going collaborations with the National Center for Supercomputing Applications (NCSA), George Mason University, and other education organizations. They are designed to be interactive tools and simulation environments that enable and encourage exploration and discovery through observation, conjecture, and modeling activities."
- WebWorkeBWorK is an open-source online homework system for math and sciences courses. WeBWorK is supported by the MAA and the NSF and comes with a National Problem Library (NPL) of over 20,000 homework problems.

- American Institute of MathematicsApproved list of of over 15 open textbooks covering different levels of calculus, algebra, and statistics.
- Center of Math"The Worldwide Center of Mathematics has a mission of making mathematics more accessible by using technology to keep costs low and quality high. They publish both open (free) and affordable textbooks and resources."
- MyOpenMath"MyOpenMath runs on the open source, IMathAS platform, providing free hosted use of this platform in support of free, open textbooks like the ones listed on OpenTextBookStore.com. The intent is to provide classroom use of the platform, without any required cost to students, for schools wanting a managed install of the IMathAS platform, and to provide students self-study opportunities."
- Open Education: Homework SystemsFrom Virginia Tech University Libraries

- Oxford Open: Science and MathematicsTitles participating in the Oxford Open scheme are broadly included in one of two open access models, either full or optional open access.

Virtual Labs

- PHet Interactive SimulationsPhET provides fun, free, interactive, research-based science and mathematics simulations.
- Shodor Interactive"The goals of Interactivate are the creation, collection, evaluation, and dissemination of interactive courseware for exploration in science and mathematics."
- Virtual Math LabCreated by West Texas A&M University, the Virtual Math Lab provides tutorials for College Algebra, Intermediate Algebra, Beginning Algebra, and Math for the Sciences.