MDBG English to Chinese dictionary - English to Chinese dictionary with Mandarin pinyin - learn Chinese faster with MDBG!
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
Pleco - The #1 Chinese dictionary app for iOS and Android
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wenlin - Wenlin Software for Learning Chinese
Clozemaster - Learn a language through mass exposure to useful vocabulary in context.