Chinese 

Chinese is spoken mainly in China, Taiwan and Singapore, though 
it is also used as Lingua Franca or as business language in many 
countries in South-East Asia. There are many regional dialects of
Chinese, which can differ as much from standard (Mandarin) 
Chinese as English differs from French. However the Chinese government 
carries through that every Chinese learns standard Chinese in addition
to the regional dialect or language. 
Even though both mainland China and Taiwan speak Mandarin Chinese,
there are substantial differences between Chinese as spoken in PR 
China and Singapore and Chinese as spoken in Taiwan. The most 
obvious difference is that Taiwan still uses the traditional set of characters,
whereas mainland China and Singapore adopted a simplified set. 

Sprachprofi File:   
Chinese-English (Pinyin transcription, not symbols)

New: Get a Chinese name!

Learn a bit of Chinese by solving a riddle

Learn the Chinese numbers and dates by solving a riddle

Sentences for Travellers

Information on the writing system

Courses:
For beginners and intermediate
Business Chinese
Conversational Mandarin

Pronunciation

Convert characters to pronunciation

Grammar
	
Phrases: Site 1    Site 2

Quiz

Online dictionary

Free help translating a phrase from/to Chinese

Professional (paid) translations from/to Chinese 

Resources for offline learning:
Chinese electronic dictionaries, translators & software
Software: Learn Chinese Now!
Pimsleur Mandarin I
A practical Chinese grammar
Reading and writing Chinese
Chinese characters: a Genealogy and Dictionary
More from amazon.com...
Chinese products from worldlanguage.com

Others:
Get a Chinese name
How hard is it to learn Chinese?
Tongue Twisters in Chinese
Cursing in Chinese (various dialects)
Chinese newspaper "Sing tao" from Hongkong
Displaying Chinese fonts on Western PCs