It's been a while since I've updated with the latest Chinese links from Free Language. So here goes, in no particular order...

Mandarin Chinese Language Overview Page

Chinese Language Resources

Loads of Multilingual Links

ChinesePod.com Olympics Site with Free Mandarin Lessons, Interactive Map of Beijing, Written and Spoken Country Names
eduFire.com Blogs about Top 20 Language Bloggers on the Web
Anki Free Flash Card Software for Debian GNU Linux, Mac OS X and Windows Based on Spaced Repetition
Chinese-Course.com Free Mandarin Course with Flashcards/Sentence Manager and Chinese Character Explanations/Annotations
German-Flashcards.com Free German Flashcard Course with Dictionary and German Text Annotation
Quizlet.com Quizlet Vocabulary Trainer w/Flashcards, Games, Quizzes and Tests w/Multiple Choice, Fill in the Blank, Matching
MeGlobe.com Jabber-Powered, Web-Based Instant Messenger with Automatic Realtime Machine Translation in 14+ Languages
TheChineseReader.com The Chinese Reader Helps Learn to Read Mandarin with Free Chinese Character Text Annotation
Busuu.com Busuu Social Language Exchange Partner Community plus Multimedia Photo-Audio Lesson Archives and Video Chat Interface
Linkua.com Linkua Online Distance Language Learning with Live Video Tutors, One-on-One Lessons and Web Classes
TheLinguists.com The Linguists Independent Documentary Film (Movie) Explores Dangers to Record Dying Languages
Semanda.com Free Chinese Vocabulary Cards with Downloadable PDFs plus Multiple Choice Quizzes for Children (Kids)
ChinesePod.com Celebrates the 1,000 Free Mandarin Chinese Audio Lessons Milestone!
hskflashcards.com Free Download HSK Vocabulary Cards in PDF Format + Print New Practical Chinese Reader Text Flash Cards (NPCR)

Language Freeware for over 70 Languages

Byki Offers a Free Language Software Application for Learning 60+ Languages at Byki.com (Windows and Mac OS X)

Book on How to Learn Languages Faster and Better

Learn That Language Now! ebook with Quick, Easy and Efficient Method for Learning Any Foreign Language

Study Abroad

Directory List of International Foreign Language Schools and Language Study Abroad Programs

Free Language recently reviewed or blogged about three social language learning networks. These are not only for learning Mandarin Chinese, they are for learning any language that the collective user base can speak!

Find out more details with these articles:

MyHappyPlanet.com My Happy Planet Private Social Language-Learning Community
LiveMocha.com Live Mocha Social Language Learning Course and Networking Website
Lingopass.com Free Global Language Exchange Community

Find out about loads of resources for learning Mandarin Chinese for free at Free Language!