Google ，谷歌～ 依然是最好的搜索引擎
百度 ，谷歌用不了的时候就用百度了
维基百科 – 自由的百科全书 ，高质量的自由百科
知乎 – 发现更大的世界 ，问答好网站
网易云课堂 – 学习是一种态度
网易公开课频道
可汗学院
A free world-class education for anyone anywhere.
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.
http://www.ted.com/talks
TED Talks – Ideas Worth Spreading ，丰富精彩高质量的演讲
Coursera
We are a social entrepreneurship company that partners with the top universities in the world to offer courses online for anyone to take, for free. We envision a future where the top universities are educating not only thousands of students, but millions. Our technology enables the best professors to teach tens or hundreds of thousands of students.
Through this, we hope to give everyone access to the world-class education that has so far been available only to a select few. We want to empower people with education that will improve their lives, the lives of their families, and the communities they live in.
EdX is a not-for-profit enterprise of its founding partners Harvard University and the Massachusetts Institute of Technology that features learning designed specifically for interactive study via the web. Based on a long history of collaboration and their shared educational missions, the founders are creating a new online-learning experience with online courses that reflect their disciplinary breadth. Along with offering online courses, the institutions will use edX to research how students learn and how technology can transform learning–both on-campus and worldwide. Anant Agarwal, former Director of MIT’s Computer Science and Artificial Intelligence Laboratory, serves as the first president of edX. EdX’s goals combine the desire to reach out to students of all ages, means, and nations, and to deliver these teachings from a faculty who reflect the diversity of its audience. EdX is based in Cambridge, Massachusetts and is governed by MIT and Harvard.
Venture Lab is one of the primary platforms used by Stanford University to offer free online courses. Venture Lab’s philosophy is to make online courses more fun and engaging by making them more experiential, interactive, and collaborative. On our platform, you will not only have access to lectures by Stanford professors, but you will also be able to form teams with people around the world and work on projects that have an impact.
待参考：http://www.douban.com/doulist/1774492/