This site (originally a book) explains the difference between commonly mixed up (traditional) characters, published by Taiwan's Ministry of Education. As it says in the introduction, the main purpo... Read more.

language.moe.gov.tw

This newly launched site offers basic information about pronunciation, mostly things that should be in all beginner courses and textbooks but seldom are. Currently, the content is fairly limited, b... Read more.

resources.allsetlearning.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

This article discusses the language power struggle that most learners are very familiar with. "Given a conscious choice between a number of languages to use for interaction, speakers will naturally... Read more.

sinosplice.com

This is a digital version of the official authoritative stroke order standard used in China. It is sorted by stroke and is not searchable, so it's a bit hard to use. Thus, other resources will ofte... Read more.

yuke.blcu.edu.cn

Character frequencies for Classical Chinese (i.e. not based on texts). This resource was discussed in this article: [The most common Chinese words, characters and components for language learner... Read more.

lingua.mtsu.edu