10,000 Friends of Pennsylvania.
An alliance of organizations and individuals committed to promoting land use policies and actions that will enable Pennsylvania to strengthen its diverse urban, suburban, and rural communities and reduce sprawl.

Center for Rural Pennsylvania.
The Center preserves and enhances the Commonwealth's rural communities by serving as the focal point for rural policy development within the Pennsylvania General Assembly.

Lancaster Farmland Trust.
Lancaster Farmland Trust is a private, not-for-profit organization working to preserve the rich and productive farmland of Lancaster County, to support good stewardship of the land, and to encourage a thriving agricultural economy, recognizing that our farm heritage enriches the lives of all citizens.

Lebanon County Conservation District.
The LCCD's Agricultural Resource Coordinator works with local farmers and the Pennsylvania Department of Agriculture's Bureau of Farmland Protection, to help preserve farmland in Lebanon County.

Pennsylvania Environmental Council.
Serves as a catalyst for the protection and improvement of Pennsylvania's environment.

Scenic America.

Smart Growth America

Smart Growth Network

Sprawl Watch Clearinghouse.

Transportation Action Network. This site has lots of great information on ISTEA reauthorization and on how transportation changes can combat sprawl.