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

Listen to native speakers, mimic the audio while recording, receive instant feedback on spoken phases. Then submit your recording to be evaluated by real native teachers. Read more.

waichinese.com

From the introduction page: The Grass-Mud Horse Lexicon is an online glossary of terms created by Chinese netizens and frequently encountered in online political discussions. This project is ... Read more.

chinadigitaltimes.net

This article describes the basics of way to teach tones that is different from the traditional way mainly in that the third tone is no longer described as a falling-rising tone (since that is rarel... Read more.

sinosplice.com

This site contains a huge number of lessons, complete with texts, vocabulary, audio, exercises and much more. And it's all free. Note that if you want to get the intermediate and advanced material,... Read more.

collections.uiowa.edu

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

A useful list of common Chinese internet memes, dirty words, slang, expressions, puns, and acronyms used by Chinese people on the internet & even in daily life. Olle's comment: As is the case wi... Read more.

chinasmack.com

This is a basic but fairly comprehensive overview of the phonology of Standard Chinese (or Mandarin, as it might be better known as). This site covers consonants, vowels, syllables, tones, word str... Read more.

en.wikipedia.org

This tool gives you the most common bigrams found in news language or general fiction (choose which one). Note that a bigram isn't necessarily a word. For instance, 一个 isn't a word, but it's a very... Read more.

lingua.mtsu.edu

Urban Dictionary is a user-edited dictionary of colloquial language and slang. This is the Chinese edition. Words are usually explained in English, but sometimes only in Chinese. There are also exa... Read more.

zh.urbandictionary.com

Duanmu San's "The Phonology of Standard Chinese" is by far the best introduction to Mandarin phonology that I'm aware of. It's mostly useful for people who like phonology or are already at an advan... Read more.

hackingchinese.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

TutorMandarin is an online Chinese tutoring software and service. Students take 1-on-1 classes with professional Mandarin tutors on PC, Android, or iOS. Full courses from Beginner to Advanced, Spok... Read more.

tutormandarin.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