I first used this dictionary during my first semester of Chinese and I have kept using it ever since. It has pretty good information about character etymology and provides more accurate information... Read more.

zhongwen.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

"Socially curated China news, blogs, videos and pictures. China news, language, travel, business, technology, politics, entertainment." This site isn't specifically geared towards language learn... Read more.

haohaoreport.com

Pandaist is a graded reader app with several hundred articles, including both news articles as well as fictional stories. Every article includes sentence translations, grammar rules and a popup cha... Read more.

pandaist.com

Outlier Linguistics Dictionary of Chinese characters is an excellent tool to help you understand and thereby learn Chinese characters more effectively. It gives you instant access to the latest res... Read more.

outlier-linguistics.com

This website allows you to look up all sorts of things related to characters, including pronunciation in historical and regional varieties, components based on their pictographic origin, and much m... Read more.

zi.tools

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

Have you ever wondered how names from other languages are transliterated into Chinese? There is actually a reference table where you can see how different sounds are translated into Chinese charact... Read more.

en.wikipedia.org