Community:
Toronto Guerilla Gardening – http://www.guerillagardening.ca/
Art Attack – http://toartattack.tumblr.com/
Beautiful City Alliance – http://bcbf.them.ca/bcbfpetition.asp
Spacing Magazine – www.spacing.ca
Vancouver Public Space Network – http://www.vancouverpublicspace.ca/
Toronto Public Space Committee (Archive) – www.publicspace.ca
Academic:
University of Toronto Cities Centre – http://www.citiescentre.utoronto.ca/Page4.aspx
CERIS – The Ontario Municipalities Centre – http://ceris.metropolis.net/frameset_e.html
Community:
Public Ad Campaign – http://www.publicadcampaign.org/
Academic:
Project for Public Spaces – http://www.pps.org/
San Francisco Planning + Urban Research Association – http://www.spur.org/