Rensselaer County Regional Chamber of Commerce
- Century-old chamber of commerce based in downtown Troy.
- http://www.renscochamber.com/

Gizmology Web Development Services
- Inexpensive web sites for businesses and individuals.
- http://www.gizmology.net/

Rifenburg Companies
- Aggregate and cement company providing services for highway and heavy construction; pits in two Rensselaer County locations.
- http://www.rifenburg.com/index.html

The Commission on Economic Opportunity
- Information on teenage opportunity programs, weatherization assistance, foster grandparenting, and similar social programs.
- http://www.ceo-cap.org/

R.M. Lill
- Describes sandblasting services and equipment, as well as high-performance paintings and coatings. Provides map.
- http://www.rmlillinc.com/