http://www.appliedlanguage.com/

http://www.proz.com/

http://www.translatorscafe.com/

http://www.schoolworkshops.com/

http://www.findschoolworkshops.co.uk/

http:/www.school-workshops.com/

 

Sites devoted to China and its language and culture (with some great language tips for beginners):

http://www.bbc.co.uk/languages/chinese/

http://www.watchtolearnchinese.com/

http://www.archchinese.com/

http://www.chinesesavvy.com/

http://www.zhongwen.com/

 

http://www.nciku.com/  - a fantastic online dictionary; great smartphone app too