60second Recap is an educational video project launched in September 2009 to provide 60-second video summaries and analysis of classic literature. The site provides one minute video commentaries on plot, themes, characters, symbols, motifs, and other aspects of books commonly studied in secondary schools in North America.

Archimedes-lab.org is a free and collaborative edutainment website developed and maintained by Gianni A. Sarcone and Marie-Jo Waeber, two authors and writers with more than twenty years of experience in the fields of visual thinking and education. The main goal of the site is to popularize math through puzzles and games.

Ask A Biologist is a pre-kindergarten through high school program dedicated to answering questions from students, their teachers, and parents. The primary focus of the program is to connect students and teachers with working scientists through a question and answer Web e-mail form. The companion website also includes a large collection of free content and activities that can be used inside, as well as outside, of the classroom. The award winning program has been continuously running for more than 14 years, with the assistance of more than 150 volunteer scientists, faculty, and graduate students in biology and related fields.

Ausmed Education is a nursing education and technology company based in North Melbourne, Australia. Ausmed specializes in web-based technological applications that help nurses with Continuing Professional Development (CPD).

ALISON (Advance Learning Interactive Systems Online) is an e-learning provider and academy founded in Galway, Ireland in 2007 by serial entrepreneur, Mike Feerick. Its stated objective is to enable people to gain basic education and workplace skills. Contrary to other MOOC providers with close links to American third level institutions such as MIT and Stanford University, the majority of ALISON's learners are located in the developing world with the fastest growing number of users in India. ALISON registered its 3 millionth learner in February 2014, making the online education provider one of the biggest MOOCs outside of the US.

Bitesize is the name given to the BBC's free online study support resource for school-age students in the United Kingdom. It is designed to aid students in both school work and, for older students, exams. Bitesize is available on a variety of platforms including the web and mobile phones.

BookRags is an educational website that provides summaries, study guides, and lesson plans on literary works. Based in Seattle, Washington, United States, the website is a subsidiary of Ambassadors Group.

Brainly (Brainly Group, Zadane.pl sp. z o.o.) is a company based in Cracow,Poland, which operates a group of social learning networks for students and educators. It is available in 13 language versions which are visited by over 40 million unique users monthly from over 35 countries of the world (as of May 2014). This startup company operates in Education Technology. The first website of the group was launched in 2009 in Poland under the name Zadane.pl. The system is based on motivational points and elements of gamification and users may engage in the online community.

BrainPop (styled BrainPOP) is a group of educational websites with over 1,000 short animated movies for students in grades K-12 (ages 6 to 17), together with quizzes and related materials, covering the subjects of science, social studies, English, mathematics, engineering and technology, health, and arts and music. BrainPop is used in more than 25% of U.S. schools and also offers subscriptions for families and homeschoolers. It is also used in schools in Mexico, the UK, Israel, France, Spain and several other countries, where it offers videos in local languages that are designed for students in those countries.

Brightstorm is an online learning platform for teenagers. It features thousands of study videos as well as other study tools and resources such as Math Genie and College Counseling. Study videos cover math courses ranging from pre-algebra to calculus as well as English, science, and test prep for SAT, ACT, and Advanced Placement tests.The website is subscription-based and allows users to watch study videos without third-party advertisements. It is reported that Brightstorm has delivered over 20 million lessons to more than 240,000 registered users from over 200 countries.

 Brilliant.org, also known as Brilliant, is a website and associated community that features problems in mathematics, physics, quantitative finance and computer science intended to discover and hone the talents of intellectually gifted school students around the world.

Cerego is an adaptive learning technology platform based on principles of neuroscience and cognitive science. Cerego’s patented technology uses the scientific method of spaced rehearsal as the basis for memory retention for content available via their website. They are located in Millbrae, California.

The Chinese Text Project (CTP; Chinese: 中國哲學書電子化計劃) is a digital library project that assembles collections of early Chinese texts. The name of the project in Chinese literally means "The Chinese Philosophical Book Digitization Project", showing its focus on books related to Chinese philosophy. It aims at providing accessible and accurate versions of a wide range of texts, particularly those relating to Chinese philosophy, and the site is credited with providing one of the most comprehensive and accurate collections of classical Chinese texts on the Internet, as well as being one of the most useful textual databases for scholars of early Chinese texts.

The CK-12 Foundation is a California-based non-profit organization whose stated mission is to reduce the cost of, and increase access to, K-12 education in the United States and worldwide. CK-12 provides free and fully customizable K-12 open educational resources aligned to state curriculum standards and tailored to meet student and teacher needs. The foundation's tools are used by 38,000 schools in the US, and additional international schools

CoboCards is a web application for creation, study and sharing of flashcards. They also provide mobile application for Android and iOS mobile devices, to help study of flashcards on the move. Based on the freemium model, CoboCards provides users a free account with two card sets compared to paid subscription with premium features such as unlimited card sets, Leitner system based trainer and collaborative learning.

Code.org is a non-profit organization and eponymous website led by brothers Hadi and Ali Partovi that aims to encourage people, particularly school students in the United States, to learn computer science. The website includes free coding lessons, and the initiative also targets schools in an attempt to encourage them to include more computer science classes in the curriculum. On December 9, 2013, they launched the Hour of Code 2013 challenge nationwide to promote computer science during computer science week until December 15, 2013. Major tech companies and their founders, including Bill Gates and Facebook’s Mark Zuckerberg, have put up about $10 million for Code.org.

Codecademy is an online interactive platform that offers free coding classes in seven different programming languages including Python, PHP, jQuery, JavaScript, and Ruby, as well as markup languages HTML and CSS. As of January 2014, the site had over 24 million users who had completed over 100 million exercises.  The site has received positive reviews from many blogs and websites, including the New York Times and TechCrunch.

CodeHS is an interactive online learning platform offering computer science and programming instruction. CodeHS, which is used by individual learners and schools, is focused on spreading access to and knowledge of computer science by offering online instructional materials supported by remote tutors.

Connexions, now called OpenStax, is a global repository of educational content provided by volunteers. The platform is provided and maintained by Rice University. The collection is available free of charge, is available for remixing and editing, and is available for download in various digital formats.

PLOS (for Public Library of Science) is a nonprofit open access scientific publishing project aimed at creating a library of open access journals and other scientific literature under an open content license. It launched its first journal, PLOS Biology, in October 2003 and publishes seven journals, all peer reviewed, as of April 2012. The organization is based in San Francisco, California, and has a European editorial office in Cambridge, England.

Course Hero is a crowdsourced online learning platform for students to access study resources like course materials, flashcards, educational videos and tutors. Its educator portal is a micropublishing platform for educators to distribute their educational resources. Course Hero collects and organizes study materials like practice exams, problem sets, syllabi, flashcards, class notes and study guides from users who upload. Users either buy a subscription or upload documents in order to receive membership and access website material.

Coursera /kɔərsˈɛrə/ is a for-profit educational technology company founded by computer science professors Andrew Ng and Daphne Koller from Stanford University that offers massive open online courses (MOOCs). Coursera works with universities to make some of their courses available online, and offers courses in physics, engineering, humanities, medicine, biology, social sciences, mathematics, business, computer science, and other subjects. Coursera has an official mobile app for iOS and Android. As of March 26, 2015, Coursera has 12,088,380 users from 190 countries enrolled. As of April 2015, it offered more than 1000 courses from 117 institutions.

Craftsy is a Denver, Colorado-based online platform that delivers crafts education, from quilting and knitting to cake decorating and paper craft, via high-definition interactive video tutorials and downloadable workshops. It also offers community project forums and craft supplies, including independent designer patterns. It was launched by the company Sympoz Inc in July 2011, and within a year Craftsy had attracted over half a million enrollments.

Cram.com (formerly known as Flashcard Exchange) is a free, web-based application for creating, studying, and sharing flashcards. Users on Cram.com have created over 68 million flashcards.

Curriki is an online, free, open education service. Curriki is structured as a nonprofit organization to provide open educational resources primarily in support of K-12 education. Curricula and instructional materials are available at the Curriki website to teachers, professional educators, students, lifelong learners, and parents. The majority of the resources on the Curriki site fall under a Creative Commons license. Educational materials are provided by the Curriki community and are peer-reviewed for quality and adherence to standards.

Cramster (now Chegg Study) provides online homework and textbook help for college and high school students in areas such as math, science, engineering, humanities, business, and writing help. Cramster uses a freemium model, allowing students to pay for or earn access to premium services. Founded in 2002 by Aaron Hawkey, Robert Angarita and Kavé Golabi, the company is headquartered in Pasadena, CA.

Cut-the-knot is a free, advertisement-funded educational website maintained by Alexander Bogomolny and devoted to popular exposition of many topics in mathematics. The site has won more than 20 awards from scientific and educational publications, including a Scientific American Web Award in 2003, the Encyclopædia Britannica's Internet Guide Award, and Science Magazine's NetWatch award. Its name is a reference to the legend of Alexander the Great's solution to the Gordian knot.

DISQO is a not-for-profit educational website. With the stated mission of "give everyone access to a first rate education", the website supplies a free online collection of more video courses and examed stored on YouTube teaching mathematics, history, finance, physics, chemistry, biology, astronomy, economics and computer science.

It differentiates from other educational website such as the Khan Academy because teachers can sign up and upload videos, creating courses and exams.

Docsity is an online Social learning (social pedagogy) network for worldwide students and professionals. Originally launched in 2010 exclusively for Italian students, it became an international website in mid-2012 by opening to worldwide students. It is advertisement-free and user-generated. Its features include document sharing, networking, news and blogs, video sharing, and a question and answer section.

eCybermission is a U.S. Army-run online educational science fair for students in grades 6-9 in the United States or at US Army schools across the world. The contest is conducted entirely online—groups of 3-4 students submit "Mission Folders", which contain detailed information about their projects following either the Scientific Method or the Engineering Design Process.

Energy Quest is the award-winning energy education website of the California Energy Commission, designed mainly for younger people. Information on the site was mostly developed by the Media & Public Communications Office of the Commission in consultation with educational experts.