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

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 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

This is a VERY comprehensive list of computer related terms in Chinese which works well for translation or detailed look-ups rather than studying. The list is mainly in traditional characters (the ... Read more.

iicm.org.tw

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

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

This is a unique resource that shows how most common speech sounds are actually produced. Most other resources use animations and diagrams, but this is the frist I see which show actual MRI scans. ... Read more.

seeingspeech.ac.uk

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 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

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

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