Pace University School of Law  
The Pace Global Environmental Law Network provides a catalogue of environmental law and facilitates global communication and scholarly interaction among environmental law specialists.

Planetizen
Planning and Development Network

Smart Communities Network
Helps communities design and implement innovative strategies that enhance the local economy, the local environment and quality of life.

Smart Growth Network  
Smart Growth Network is a group that helps create national, regional, and local coalitions to encourage metropolitan development that is environmentally, fiscally, economically and socially smart.

Sustainable Communities Network  
Resources to implement processes and programs to restore the economic, environmental and social health and vitality of communities.