This site by Jun Da contains a lot of very interesting resources for anyone who wants dig deeper into frequency lists. One set of data I haven't found anywhere else is a frequency list of syllables... Read more.

lingua.mtsu.edu

Tatoeba offers sentences in many languages (you can choose yourself which languages to search for). This is excellent if you want to find your own example sentences for your Chinese vocabulary or i... Read more.

tatoeba.org

Linqapp is the app for language learners. No matter what question you have on your mind - Linqapp connects you with native speakers who assist you on the spot - no matter where you are. It's just l... Read more.

linqapp.com

A website on the etymology of Chinese characters, with a lot of images of their past forms from different periods. Read more.

chineseetymology.org

Ninchanese is a complete way to learn Chinese. Its online course allows you to learn and practice how to read, write, speak and understand Chinese in an enjoyable manner. It combines game mechanics... Read more.

ninchanese.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

The ultimate solution for quickly looking up Chinese words on your smartphone or tablet, no matter what app (or system screens) you are using. Note: For Android 5.0 (Lollipop) and higher. Whe... Read more.

play.google.com

"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

Word Reference offers several good forums for discussing languages and this is the Chinese section. It's perhaps not as active as Chinese Forums and I don't follow this forum regularly, so I don't... Read more.

forum.wordreference.com

Pro version gives you: ★ Chinese handwriting recognition built in* ★ Mandarin audio - over 2,000 audio files of a real native Chinese speaker ★ Homescreen Widgets - flip through your favorite wo... Read more.

play.google.com

This is a neat little app that allows you to find language exchange partners easily. There are also some feature to help you manage your language exchanges, such as forcing equal usage of the two l... Read more.

hellotalk.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

This pinyin converter turns pinyin with numbers into pinyin with tone marks. Enter pinyin followed by numbers 1-4 represent the Chinese tones.  For neutral tone words, either type 5 or no number. Read more.

toshuo.com

This is a comprehensive introduction to the world of digital Chinese, including the following: Script Basics Activate Keyboards for Typing Browser Recommendations Web Developm... Read more.

sites.psu.edu

Forumosa is a major online forum where you can discuss anything regarding Taiwan, including living there, learning Chinese, finding friends, jobs or language exchange partners and much more. There'... Read more.

forumosa.com

A blog written and managed by an advanced Chinese featuring reviews of books, TV dramas and games. Additionally, the blog also features recommendations for utilising media in Chinese language learn... Read more.

thecozystudy.com

Language Reactor is a Chrome extension that helps you learn a language while watching your favorite Netflix show or videos on YouTube. It shows subtitles in your target language, in your native lan... Read more.

languagereactor.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

Open-source, community edited Chinese-Hungarian dictionary • 11,000 headwords • Handwriting recognition • Stroke order animations Read more.

chdict.zydeo.net

This is a research paper detailing a study of the mutual intelligibility of Chinese topolects. Dialects were sorted into groups and then it was experimentally tested how much of words and sentences... Read more.

openaccess.leidenuniv.nl

aoeu Read more.

dn.se

This is a review of Perry Link's book about Chinese. This passage sums it up pretty well, and although I haven't read the book (yet), it's high on my list of books to get my hands on: "In writin... Read more.

lareviewofbooks.org