1. ChinesePad and ChineseWriter (www.trainchinese.com)
2. Hi NiHao https://itunes.apple.com/tw/app/hi-nihao/id444057579?mt=8
3. Making flash cards and practice. http://www.studystack.com/Chinese
4. Flash cards and games. http://quizlet.com/subject/chinese/
5. A very good website provides on-going Chinese learning. http://edu.ocac.gov.tw/culture/biweekly/689/e/indexe.htm