This site is best described as a Chinese version of Quora, so in other words a site where people ask and answer questions (and discuss other people's questions and answers). Read more.

zhihu.com

Finally, Duolingo added a En->ZH course. As Duolingo is the most popular gamification learning app, the learning experience is relatively streamlined and tested. The monetarization aspect leads to ... Read more.

en.duolingo.com

This is the best overview of spaced repetition research I have seen online or offline. It's thorough, well-argued and probably covers more than you were looking for. It's not specifically about Chi... Read more.

gwern.net

Tianya Club is a very popular online Chinese forum (according to Wikipedia, it's the twelfth most visited website in China). The site is massive, including not only a forum, but also blogs, photo s... Read more.

bbs.tianya.cn

This is a story about looking Chinese but not knowing how to speak Chinese. It's an eye-opener for people who don't look Chinese and study Chinese, but it might also be painfully familiar for stude... Read more.

youtube.com

This is a presentation by Thomas S. Mullaney about Chinese typewriters through history. In the digital age, typing in Chinese is easier than it has ever been, but how did the Chinese typewrite evol... Read more.

youtu.be

This subreddit is, as the name implies, about reading books in Chinese. A book is chosen each week by the members and is then read and discussed. Usually, there are links to various versions of the... Read more.

reddit.com

Have you ever wondered what a small 二 or weird symbols that look like 〻 or 々 mean in Chinese handwriting? These aren't characters you normally find in printed books, but they do exist in handwritin... Read more.

en.wikipedia.org