Architectural Index for Ontario - The Metro Toronto Reference Library has compiled an index of periodical and monograph citations on buildings throughout Ontario.
Archiseek - this is an online architecture resource that focuses on Canadian architecture and includes buildings of Canada and links to RAIC, CCA and Canadian Architect.
Canadian Architect and Builder - The Canadian Architect and Builder (CAB) was published between 1888 and 1908 and is the only professional architectural journal published in Canada before World War I. Beautifully filled with photographs, drawings, advertisements and valuable articles, CAB provides a wealth of information on the state of architecture and building in Canada during the late 19th and early 20th centuries.
Aladdin Homes - This is the archives of Canadian Aladdin Co., where one could order homes from their 1918 catalogue.
Archinet - images, news, discussion groups, jobs, an events calendar, books and reviews. The image collection here consists of nearly 1,000 photographs of architecture world wide, drawings of architectural projects, projects under construction, student projects, etc.
Architecture/UCLA Arts Library - This is an extremely comprehensive site with links to associations, schools; themes such as gender in architecture, the green environment, etc.
Sears Archive - this includes pictures and information of homes that one could purchase from the Sears Catalogue.
Vassar College Art Library - This is an excellent site for architectural resources including image catalogues & building registries, architects, codes, standards & data archives, manufacturer information etc.