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

Recommended and introduced by Trevor [here](http://www.hackingchinese.com/extensive-listening-challenge-october-2014-wrapping-up/#comment-646686). Each book (one for each level of the new HSK ex... Read more.

amazon.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

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

Ideally, we would study Chinese just because we want to and in any manner we see fit, but this isn't how it works for most students. Instead, we need to care about tests and grades, an extra layer ... Read more.

hackingchinese.com

Arch Chinese offers a wide range of tools, but the thing I really find worth highlighting is the dictionary. It's pretty helpful for beginners as it contains stroke order animations and a lot of in... Read more.

archchinese.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 website offers a large number of previous HSK and YCT Chinese proficiency tests, sorted by year and level. This is excellent for test preparation and/or benchmarking. Read more.

chinesetest.cn

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

From the about page: Phonemica is a crowd-sourced project to record spoken stories in every one of the thousands of varieties of Chinese. We believe that each language and dialect is a priceless... Read more.

phonemica.net

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

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

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