search.credoreference.com
Credo Reference is an information skills solutions provider that serves libraries worldwide. We build platforms and instructional materials that enable the flexible configuration of content, technology and services for the purpose of connecting learners, faculty and teachers, librarians and publishers. Credo promotes knowledge building, problem solving and critical thinking to give people the information skills necessary for success throughout their academic, professional and personal lives.
Credo, founded in the U.K. under the name of Xrefer, has helped colleges, universities and public libraries successfully educate students and patrons since 1999. Its headquarter is in Boston, MA, USA and maintaining an office in the U.K.

Infotrac.galegroup.com
For more than 60 years, Gale, a leading prestigious organization, has partnered with libraries around the world to empower the discovery of knowledge and the understanding of all people for all purposes.
Knowledge is power, and the act of learning is empowerment. Access to knowledge offers learners an opportunity to discover vital motivation and inspiration to make a positive contribution in not only their lives but also the rest of the world. That is why Gale provides curated and original content libraries, as well as modern research tools that are crucial in connecting libraries with learning and learners with libraries.

MIT OpenCoursewave
Massachusetts Institute of Technology Open Course Ware – MIT Open Course Ware Includes 2000 free courses sponsored by Massachusetts Institute of Technology.

Coursera
Coursera is one of the most famous and reputable open-source materials available nowadays, founded in 2012 by two Stanford University professors. Coursera offers free online courses from leading universities such as Stanford, Princeton, Universities of Michigan, Pennsylvania … With more than 2000 courses in more than 180 majors, the number of students participating in Coursera has reached more than 25 million.

edX
Founded by Harvard University and Massachusetts Institute of Technology in 2012, edX is a provider of open-ended online public courses. edX has the participation of more than 90 leading universities and institutes around the world to organize high quality courses in many disciplines for all types of students. edX currently has more than 1300 courses, 10 million students with a total enrollment of more than 33 million.

Udemy
Udemy is an online learning platform founded in 2010. Udemy offers two types of online geometry: free and paid for everyone. More than 45,000 high-quality courses are taught by the university’s leading experts and faculty. Udemy attracts more than 15 million students worldwide for its rich, quality and multi-disciplinary content.

Wiley Online Library
Wiley Online Library is an e-library in the form of online subscriptions belonging to John Wiley & Sons Company, created on August 7, 2010 to replace WileyScience. This e-library is considered a convergence of many online information sources in fields such as Life, Health, Physical Sciences, Social Sciences and Humanities. Wiley Online Library provides users with access to more than 4 million articles from 1,600 journals, more than 22,000 books and hundreds of reference works, draft decrees, data sources from John Wiley Sons Company and other sources such as Wiley-Blackwell, Wiley-VCH, and Jossey-Bass.

www.gutenberg.org
Gutenberg was founded in 1971 by American writer Michael S. Hart. It is the oldest digital library. The project provides completely free documents that can be used for long-term and the documents are computer-based. On May 20, 2020, Gutenberg reached the milestone of 62,108 free online products. It is a digital library that provides users with thousands of documents in various genres. All information on this site is publicly available, providing users with access to books, academic articles, and multi-genre texts.

Free Editorial
Free Editorial is an online library and book publisher for readers and journalists worldwide. Through this website, users can download books for free without having to log in. The books provided could be downloaed in various formats.

Open Library
Open Library is a nonprofit digital library, funded in part by the California State Library and the Kahle/Austin Foundation, with more than 20 million holdings from many major collections as well as individual contributions from readers. Open Library aims to become a digital library that stores every book ever published. Therefore, Open Library operates as an open library with data and documents contributed by readers.

European Digital Library
Europeana is the European Union’s digital library initiative, funded by the European Union’s Connecting Europe Facility and the European Union countries. With a mission to empower cultural heritage in the digital transformation process, Europeana focuses on developing expertise, tools and policies to embrace digital change and foster partnerships to drive innovation. Through partnerships with thousands of archives, libraries and museums across Europe on a mission to share cultural heritage for enjoyment, education and research, Europeana provides readers with millions of books, songs, works of art and more – with sophisticated search and filtering tools to help readers find what they need.

Harvard Online Courses
Harvard University’s open learning resources include more than 100 free courses in many fields. Besides courses in life, nature and all the things around us, you also have the opportunity to develop scientific thinking abilities, mathematical skills and methods of approaching and solving problems, therefore, helping you answer the question of how to learn, absorb knowledge and develop yourself

Google Online Courses
Explore a range of learning content designed to help you grow in business or entrepreneurship. You can study by choosing individual modules or dive in and take the entire course from top-to-bottom.