Green Door Services (GDS)
- A software development consultancy, specializing in Extreme Programming and other Agile methods.
- http://www.greendoorservices.com/

Binary Essentials
- Offer consulting, coaching and implementation support in the processes and practices of Extreme Programming.
- http://www.binaryessentials.com/

Industrial Logic
- Offers XP training, consultancy and organisational assessment. Based in San Francisco, CA.
- http://www.industriallogic.com/

Diamond Sky Software
- Provides tools to help plan extreme project.
- http://www.diamond-sky.com/

RoleModel Software
- Agile software development with Extreme Programming (XP) in Holly Springs North Carolina (Research Triangle Area).
- http://www.rolemodelsoftware.com/

Jera Design
- Extreme Programming consulting and coaching in the San Francisco Bay Area.
- http://www.jera.com/