CLP-1 Differential Calculus, Joel Feldman, Andrew Rechnitzer, Elyse Yeager
First of four volumes of traditional calculus from the University of British Columbia.
Discrete Mathematics: an Open Introduction, Oscar Levin
An example of applying style to content.
Understanding Linear Algebra, David Austin
Applied linear algebra with custom interactive explorations.
Active Calculus: Single Variable, Matthew Boelkins, David Austin, Steven Schlicker
Calculus through active learning.
Modeling, Functions, and Graphs: Algebra for College Students, Katherine Yoshiwara, Bruce Yoshiwara
Comprehensive treatment of college algebra organized around modeling, functions, and graphs.
ORCCA: Open Resources for Community College Algebra, Portland Community College Faculty
7,000 exercises, with 5,600 implemented in WeBWorK.
Abstract Algebra: Theory and Applications, Thomas W. Judson
Traditional abstract algebra with a heavy dose of modern Sage computational cells.
The Story of 8, Michael P. Hitchman
Expository writing, with tongue in cheek.
Music Theory for the 21st-Century Classroom, Robert Hutchinson
PreTeXt is not just for STEM.
Combinatorics Through Guided Discovery, Kenneth P. Bogart
Lost, found, converted, edited, and modernized.