Other
Mind Gazer: Tao Te Ching
This site contains an introduction to the Tao Te Ching and the actual text.
Other
Music From China
Site has the history of Chinese music. You can find examples of Chinese instruments, dates, developments, and descriptions.
Other
Chinese Classical Literature
This is a really interesting site. It lists several works of Chinese literature. They are in Chinese, and you can click on each word to see its English translation. It can also be seen in English only.
Friesian School
Friesian: Comments on the Tao Te Ching
This is one person's perspective on the Tao Te Ching from Friesian.com. It gives an interesting interpretation of the book.
Other
Wussu.com: Tao Te Ching a Comparative Study
Includes translations of the chapters of the Tao Te Ching and overviews of the text. Offers many different interpretations of the ancient writings.
Other
The World's Religions and Their Scriptures: Taoism
Scroll down to the third paragraph of the section on Taoism. Discusses the sources of philosophical Taoism.