Canadian Standards Association (CSA)
http://www.csa.ca/Default.asp?language=english
U.S. Consumer Produce Safety Commission (CPSC) 
http://www.cpsc.gov/cpscpub/pubs/playpubs.html
American Disabilities Act (ADA) 
http://www.usdoj.gov/crt/ada/adahom1.htm
Consumer Federation of America (CFA)
 http://www.consumerfed.org/topics.cfm?section=Health%20and%20Safety&topic=Playground
Canadian Hospitals Injury Reporting and Prevention Program (CHIRPP)
http://www.phac-aspc.gc.ca/publicat/chirpp-schirpt/index.html

Canadian Playground Safety Institute (CPSI) through Canadian Parks and Recreation Association (CPRA)  http://www.cpra.ca/e/training/cpsi/index.htm
The Playground Academy through Ontario Parks Association (OPA)
http://www.opassoc.on.ca/ontplayacad.php
National Playground Safety Institute
http://www.nrpa.org/content/default.aspx?documentId=5129

Canadian Association of Playground Practitioners (CAPP) 
www.capp-online.ca
Canadian Parks and Recreation Association (CPRA)
www.cpra.ca
International Play Equipment Manufacturers Association
www.ipema.org
National Program for Playground Safety (USA) 
www.uni.edu/playground
Ontario School Boards' Insurance Exchange (OSBIE)
www.osbie.on.ca
Parks and Recreation Ontario (PRO) 
www.prontario.org
Safe kids Canada
www.sickkids.ca/safekidscanada