1- OER Commons
Open Education Resources (OER) Commons is a platform that provides open access to a wide variety of open educational resources that are either in the public domain or are licensed under Creative Commons. These resources include things such as :"full courses, course materials, modules, textbooks, streaming videos, tests, software, and any other tools, materials, or techniques used to support access to knowledge."
2- Bookboon
‘Bookboon has published more than 1,000 free textbooks for students. These textbooks can be downloaded in PDF format without prior registration.’
3- Open Textbook Library
‘The Open Textbook Library provides a growing catalog of free, peer-reviewed, and openly-licensed textbooks. Explore the library's books to see if an open textbook fits your course's, and students', needs.’
4- TextBookGo
‘TextBookGo.com is your number one source for free e-textbooks. We bring you free digital textbooks from all sources and for all courses! We offer free e-textbooks for many subject categories and for all tablet and digital textbook viewing devices.’
First appeared here