The B.C. Open Textbook Project provides textbooks including Analytical chemistry, Organic Chemistry With a Biological Emphasis, and Chemistry - Atoms First.
UC Davis's ChemWiki includes modules on the core information in the fields of organic chemistry, inorganic chemistry, biochemistry, physical chemistry, and analytical chemistry.
The LibreText Project offers campus courses, a list of books, and ancillary materials.
Lumen Learning provides a Chemistry textbook that covers chapters on Organic Chemistry, Nuclear Chemistry, Mass Relationships/Chemical Equations, and Basic Concepts of Chemical Bonding.
MERLOT is a curated collection of free and open online teaching, learning, and faculty development services contributed and used by an international education community.
This is a great resource that provides textbooks on chemistry studies.
OER Commons provides a curated collection of textbooks and resources for Chemistry students.
Close to fifty open textbooks on topics related to chemistry.
Browse a wide selection of chemistry textbooks.
Provides a robust search to limit by activity type, media format, and age level. (Actually a pre-defined subset of the OER Commons)
More advanced, specific science resources that are open and could be used in a classroom setting.
Funded by the NSF and organized by Library of Congress subject headings. Aimed at Community and Technical Colleges, but free for all.
Created by a group of faculty and staff at Carnegie Mellon to help those teaching/learning chemistry.