Washington-Greene Association of Realtors
- Trade organization. Includes directory of members, information on committees and calendar of events.
- http://www.wash-greene-realtors.com/

Realtors Association of York & Adams Counties
- Member directory, homes for sale, area information, schools.
- http://www.rayac.com/

Pennsylvania Association of Realtors
- Realtor trade association for businesses, brokers and agents in the real estate industry.
- http://www.parealtor.org/

Northwood Realty Services
- Agency with offices across the state. Features property search, open house schedule, agent directory, relocation information, career opportunities.
- http://www.northwood.com/

Jack Gaughen Realtor ERA
- Agency with fifteen offices in seven counties. Virtual tours of houses for sale, descriptions, searches, career information.
- http://www.jgr.com/

Keystone ASHI
- Find a list of home inspectors for Berks, Bucks, Chester, Lancaster, Lehigh and Montgomery Counties.
- http://keystoneashi.org

Pennsylvania Home Inspectors Coalition
- Represents home inspectors compliant with Pennsylvania regulations.
- http://phic.info/