- MyOpenMathMyOpenMath 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.
- WeBWorkWeBWorK 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. Problems in the NPL target most lower division undergraduate math courses and some advanced courses. Supported courses include college algebra, discrete mathematics, probability and statistics, single and multivariable calculus, differential equations, linear algebra and complex analysis.

- Approved OER Textbooks from the American Institute of MathematicsThe list below groups open textbooks by course title. All the books have been judged to meet the evaluation criteria set by the AIM editorial board. Click on the above link.

Liberal Arts Math

College Algebra and Precalculus

Calculus

Differential Equations

Linear Algebra

Introduction to Proofs

Discrete Math

Combinatorics

Mathematical Computing

Numerical Analysis

Abstract Algebra

Number Theory

Real Analysis

Complex Analysis

Geometry and Topology

Probability

Statistics

Logic