The Basics of General, Organic, and Biological Chemistry by David W. Ball, John W. Hill, and Rhonda J. Scott is for the one-semester General, Organic and Biological Chemistry course.

From OpenStax. Chemistry 2e is designed to meet the scope and sequence requirements of the two-semester general chemistry course.

Chemistry: Atoms First 2e is a peer-reviewed, openly licensed introductory textbook.

This textbook is intended for a sophomore-level, two-semester course in Organic Chemistry targeted at Biology, Biochemistry, and Health Science majors.

From the College of Science at Oregon State: three free online books and three free online courses.

Includes textbooks and supplemental modules.