PinYinPal
CCAD Games - Learn Chinese Language
Chinese Pinyin-Learn Mandarin
longislandicedtea
速学汉语拼音-学普通话拼音标准发音水平测试好帮手
Majestech LLC.
pinyin—chinese pronunciation
LingSong Chinese
Pinyin Drill: Learn Chinese
Joba solutions
轻松学拼音发音
zse
Chinese To Pinyin
Charalambides
初级汉语拼音学习 - 快乐学中文拼音入门
休闲益智小站
Learn Pinyin Chinese. Speak Pi
Bluebird Languages
洪恩拼音-儿童趣味拼音拼读
iHuman Inc.