Tools and Downloads
This tool attempts to quantify the level of difficulty of a passage of Chinese text by assessing the relative frequency (according to a very large news-based corpus) of the characters contained therein.
As it appears in the TPS Frequency Dictionary of Mandarin Chinese. (also available as a one-page quick reference)
A one-page reference sheet of Mandarin pronunciation and romanization, with examples from English pronunciation.
Character Writing Grids
Listing of the 3,500 most frequently occurring (simplified) Chinese characters.