- Hanzi Writer - https://github.com/chanind/hanzi-writer - Converted the stroke drawing code from this project into React Native
- CC-CEDICT - https://www.mdbg.net/chinese/dictionary?page=cedict - Chinese Dictionary
- curve-matcher - https://www.npmjs.com/package/curve-matcher - Check similarity between strokes and user input
- d3 - https://d3js.org/
- pinyin-tone-convert - https://www.npmjs.com/package/pinyin-tone-convert - Convert pinyin numbers into tones
- words in each HSK level - Unfortunately I cannot find the site anymore
- pinyin audio files - https://github.com/shikangkai/Chinese-Pinyin-Audio (I think...)
https://github.com/harryli0088/chinese-processing-scripts/blob/master/index.js
MIT