Note: Links already given in the Further Reading sections of the Reader with not be repeated here.
GENERAL / ORIENTATION
Buddha-net has a lot of useful resources for learning about Buddhism, including Chinese Buddhism.
At the International Dunhuang Project site you can get access to some beautiful photos of manuscripts and early printed documents originally from Dunhuang and other archaeological sites along the silk road, including many Chinese sutras and other texts.
Chinese Buddhist Canonical Attributions Database has lots of information regarding the attribution and dating of Chinese Buddhist texts, particularly where there is some controversy.
There is a very good series of lectures by on the History of Chinese Buddhism by 李元祥 on Youtube. The first lecture is at https://www.youtube.com/watch?v=rpQeMEI5aZ0 . One advantage of these videos is that there are subtitles in Chinese (簡體字）in case, like me, your listening ability is not very high.
If you have a good listening ability in Putonghua, also take a look at 中國佛教史 , which consists of 17 videos of a lecture course in the history of Chinese Buddhism from Dharma Drum Mountain in Taiwan. It is very clear, although the teacher has a Taiwanese accent.
There is a useful forum for discussing questions about Classical Chinese, although there is little or nothing on Buddhist Chinese.
UNIT ONE: THE HEART SUTRA
A video of the Heart Sutra chanted in traditional fashion by monks and nuns at Dharma Drum Mountain.
This podcast on the Heart Sutra by Domyo Burk is a good, accessible introduction to the sutra. It has a line by line explanation (of an English translation of the text) and assumes no previous knowledge of Buddhist concepts.
An attractive easy-to-read manuscript of the sutra (attached to a news site)
A reproduction of the Yuan dynasty calligrapher Zhao Mengfu’s Heart Sutra (attached to the Wikipedia entry on the Heart Sutra)
A picture of Xuanzang with his backpack (attached to the Wikipedia entry on Xuanzang)
UNIT TWO
For articles on and translations of Chinese Agamas go to Chinese Agama Studies.
Although this podcast interview with Bhikkhu Analayo focuses mainly on the Sattipatthana Sutra (四念處經) he also talks more generally about comparing the Pali Nikayas with the Chinese Agamas.
You might also find interesting this video interview with Bhikkhu Analayo in which he talks about respecting different Buddhist traditions.