ArchiNed
Features news, column, discussion, jobs, books, magazines and all links relevant to architecture in the Netherlands.
http://www.archined.nl/en/

ArchitectsJURY.com
A community site for architects. Here you can publish your designs, be judged by the community, and get discovered by others.
http://www.architectsjury.com/

Cast Stone Institute
Organization of cast stone manufacturers, associates, professional architects, engineers, and concrete technologists. Features membership directory, technical resources and photographs.
http://www.caststone.org

Delirious LA
Offers information of LA axhibits, essays, and projects by Alan A Loomis exploring the relationships between urbanism, landscape and architecture. Includes reviews, research, projects and guides.
http://www.deliriousla.net/