Top websites that offer education to the world

Peer 2 Peer University (we mostly just say P2PU) is a grassroots open education project that organizes learning outside of institutional walls and gives learners recognition for their achievements. P2PU creates a model for lifelong learning alongside traditional formal higher education. Leveraging the internet and educational materials openly available online, P2PU enables high-quality low-cost education opportunities.
Learning for the people, by the people. About almost anything.

Scitable is a free science library and personal learning tool brought to you by Nature Publishing Group, the world's leading publisher of science. Scitable currently concentrates on genetics and cell biology, which include the topics of evolution, gene expression, and the rich complexity of cellular processes shared by living organisms. Scitable also offers resources for the budding scientist, with advice about effective science communication and career paths.

Coursera is an education platform that partners with top universities and organizations worldwide, to offer courses online for anyone to take, for free.
We envision a future where everyone has access to a world-class education. We aim to empower people with education that will improve their lives, the lives of their families, and the communities they live in.

Bookboon.com provides 1000+ free eBooks. You can download textbooks and business books in PDF format without registration. The books are financed by a few in-book ads. Bookboon.com is the biggest eBook publisher in the world.

Open Culture brings together high-quality cultural & educational media for the worldwide lifelong learning community. Web 2.0 has given us great amounts of intelligent audio and video. It’s all free. It’s all enriching. But it’s also scattered across the web, and not easy to find. Our whole mission is to centralize this content, curate it, and give you access to this high quality content whenever and wherever you want it.

Khan Academy is an organization on a mission. We're a not-for-profit with the goal of changing education for the better by providing a free world-class education for anyone anywhere.
All of the site's resources are available to anyone. It doesn't matter if you are a student, teacher, home-schooler, principal, adult returning to the classroom after 20 years, or a friendly alien just trying to get a leg up in earthly biology. Khan Academy's materials and resources are available to you completely free of charge.

Over 750 free online college courses and lectures are available from MIT, Harvard, Stanford, Yale, Berkeley and more. A world of learning is just a click away!

Skillshare is an online learning community to master real-world skills through project-based classes. Our mission is simple: provide universal access to high-quality learning.

Smarthistory at Khan Academy is the leading open educational resource for art history. We make high-quality introductory art history content freely available to anyone, anywhere. Smarthistory is a platform for the discipline where art historians contribute in their areas of expertise and learners come from across the globe.

Flat World Knowledge is passionate about helping solve these critical issues facing higher education today — affordability, access and student success.
Flat World provides high-quality, affordable college textbooks and an online platform that allows instructors and institutions to personalize content in new ways to help students succeed. The company revolutionized the creation of higher education textbooks, using digital technology to more efficiently and affordably deliver quality content to more than 1 million students, 13,000 faculty, and 2,500 institutions worldwide.

ExamTime is a personal learning environment that allows students & teachers to create, discover and share learning resources. Transform your learning and achieve your goals with ExamTime