2nd Wind Heating & Air Conditioning, Inc.
- Provides heating and air conditioning sales and service from locations in Columbia and Camden; includes company profile, products, and contact information.
- http://www.2ndwindhvac.com/

Home Builders Association of Greater Columbia
- Professional association of residential home builders from the midlands; includes buyer's guide, links, events, and contacts.
- http://www.columbiabuilders.com/