Planning, Architecture, etc.

Urban and Regional Planning
UCSD Physical Planning Office - oversees planning on campus
American Planning Association - an independent, not-for-profit educational organization that provides leadership in the development of vital communities
The College Sustainability Report Card - the first website to provide in-depth sustainability profiles for hundreds of colleges in all 50 states and canada
The Venus Project - beyond politics, poverty & war
Siemens Sustainable Urban Development - green solutions for the growth of cities
Peace Corps Urban and Regional Planning - volunteers work with municipalities and communities, in addition to regional or national governments
CityOne - a smarter planet game
The Seasteading Institute - creating permanent dwellings on the ocean - homesteading the high seas
Grosvenor - modern international property company in london
GeoSim - builds precise and realistic looking 3d-models of actual cities, offering a full spectrum of generic products and custom solutions for developers and city planners, tourism and real estate, security and defense, 3d yellow pages, advertisement, media and entertainment
Planetizen - urban planning, design and development network
The Antiplanner - hmm...

Architecture
Jonathan Segal
Lloyd Ruocco
Global Architecture Brigades

International Studies
United Nations (UN) - international organization whose stated aims are facilitating cooperation in international law, international security, economic development, social progress, human rights, and the achieving of world peace
International Rescue Committee (IRC) - organization that goes to crisis zones to rescue refugees
UN-HABITAT - the united nations human settlements programme is the united nations agency for human settlements; it is mandated by the un general assembly to promote socially and environmentally sustainable towns and cities with the goal of providing adequate shelter for all.
United States Agency for International Development (USAID) - united states federal government agency primarily responsible for administering civilian foreign aid
Central Intelligence Agency - independent agency responsible for providing national security intelligence to senior us policymakers
Chemonics - international development consulting firm that promotes meaningful change to help people live healthier, more productive, and more independent lives

General Sustainability
San Diego Loves Green - comprehensive portal of information set to inspire and empower local residents and business owners with concrete information, ingenious innovation, a variety of choices, a supportive network – and most of all, an easy way to participate in the swelling green movement
Jim Bell - "we are astronauts on spaceship earth"
Earth Clock - world population, oil use, forest information, etc.

LinkedIn - career networking site
Idealist.org - interactive site where people and organizations can exchange resources and ideas, locate opportunities and supporters, and take steps toward building a world where all people can lead free and dignified lives

News, Reports, Blogs, and Articles
The 5 Best Cities For Green Jobs
America's 10 Most Walkable Cities
Top 10 List of Green Career Fields