http://www.youtube.com/watch?v=b9Ayvjy-Dgs&feature=player_embedded#
Pinyin in six minutes

http://www.confuciusinstitute.net/
Confucius Institute Online

http://www.confuciusinstitute.net/online/indexOnline.htm
Free Online Lessons from Confucius Institute

http://readchinese.nflc.org/
"Read Chinese" at the National Foreign Language Center, U. of Maryland novice, intermediate and cultural levels

http://www.hellomandarin.com/ilovechinese/characters/ 
I Love Chinese-Learn Chinese Online: Practice Listening, Chinese pod cast, Chinese audio, Chinese mp3,Chinese video, Audio resource, Watch Chinese learning video resources

http://www.clavisinica.com/resources.html
Chinese language resources.

http://www.unilang.org/wiki/index.php/Chinese_Grammar
Chinese Grammar

http://www.zhongwen.com/
Zhongwen.com: Chinese characters and culture

http://chinese-linkwords.blogspot.com/
Chinese Link words: Remember words by linking their pronunciation

http://www.mandarintools.com/
On-line Chinese tools, including flash cards and dictionary
http://www.mandarintools.com/dimsum
Chinese Reading Assistant and Dictionary

http://pinyinpractice.com/wangzhi/
Pinyin Practice. Click on the tabs (Tones, Initials, Finals) at the top of the page for characters and sound. Includes tone recognition activities
Basic grammar and vocabulary practice in Pinyin: http://pinyinpractice.com/speakchinese/speakchinese.html

http://www.popupchinese.com/archives/shows
Popup Chinese Lessons. Different skill levels, including absolute beginners: http://www.popupchinese.com/archives/shows/absolute-beginners

http://ehaton.blogspot.com/
Includes links to the following resources:
Pablo, a free Chinese-English dictionary for Windows.
Pingrid, a game to train your Chinese vocabulary.

http://www.standardmandarin.com/chinesephrases
How to pronounce basic Mandarin Chinese phrases

http://weber.ucsd.edu/~dkjordan/chin/china.html
China-related resources

http://www.languageguide.org/mandarin
Mandarin Chinese vocabulary guide and pronunciation practice

http://laowaichinese.net/table-of-contents
Tips and strategies for learning to speak Mandarin Chinese

http://www.zapchinese.com
Learn Mandarin Chinese. Vocabulary and phrases with audio. Practice with Chinese characters.

http://zdt.sourceforge.net/main/
Mandarin Chinese flash card application in Java.

http://www.chinese-tools.com/learn/chinese
Chinese lessons including reading, grammar, character practice.

Cengage: Chinese for the Global Community (Jiā yóu!)
Student companion site for the Jiā yóu! textbook

http://de.mdbg.net/chindict/chindict.php?page=main#
Online Chinese dictionary

http://readchinese.nflc.org/?page=home
U.S. Department of Education site provides practice reading in Chinese

http://pinyin.info/links.html
Links for pinyin-related articles and practice

http://www.china-on-site.com/language/phonetic/phonetic.htm
Some basic pinyin-Chinese phonetics

http://chinese.rutgers.edu/class_content_simplified_chinese/level1/class1-to-9/class1/intro.htm
Information on Chinese pronunciation

http://www.winvue.com
Winvue Active Chinese software

http://www.panwapa.com/panwapasplash.php
Sesame Street, with Chinese included

http://www.china-on-site.com/
China guide and Chinese culture

http://www.xinhuanet.com/english/
China View

http://weber.ucsd.edu/~dkjordan/chin/hbtales.html#
Chinese Tales

http://www.dashan.com/
Da Shan

http://www.tc.columbia.edu/tcsol/index.asp?Id=Useful+Links&Info=Useful+links
Links for TCSOL at Teachers College Columbia University

http://www.cultural-china.com/
A variety of information about Chinese culture. Includes a section on a new character each day.

Chinese Lessons on YouTube