Ethnologue: Singapore
Website explores the origins of the 26 listed languages in Singapore
http://www.ethnologue.com/show_country.asp?name=Singapore
Speak Good English Movement
Governmental campaign to encourage Singaporeans to speak good English and to reduce the use of Singlish.
http://www.goodenglish.org.sg/
Speak Mandarin Campaign
Official site of the campaign offering on-line learning aids and information on available courses
http://www.mandarin.org.sg/