USSSA - Slowpitch
- Official site of and governing body for the United States Specialty Sports Association.
- http://www.usssa.com/sports/Home.asp?Sport=17

North American Gay Amateur Athletic Alliance
- Gay softball leagues in about 30 cities with two divisions: Open and Women's.
- http://www.nagaaasoftball.org/

Maryland ISA
- The state's Independent Softball Association that offers various leagues for differing levels of play for men, co-ed and senior teams. Features news, calendar, and registration and contact forms.
- http://www.isamd.com/

Capital Softball Association
- Members, photographs, and contacts. Located in Bhubaneswar, India.
- http://indiansoftball.freehomepage.com/index.html

SPOA Slo-Pitch Ontario Association
- Provides news, information, handbook, magazine, merchandise, volunteer and membership information, and links.
- http://www.slopitch.org/

Senior Softball-USA
- Sanctions tournaments and championships, registers players, writes the rulebook, publishes Senior Softball-USA News, hosts international softball tours and promotes senior/master-level softball.
- http://www.seniorsoftball.com/

National Softball Association for the Deaf (NSAD)
- News, history of NSAD, directory, regions, tournaments, by-laws, rules, umpires,message board, links.
- http://www.nsad.org

Southern Softball Association of America
- A National Softball organization, established in North Carolina in 1984. Sanctioning all types of softball from Adult, Girl's FastPitch, Girl's and Boy's Slow Pitch
- http://www.ssaasoftball.com

Softball Canada
- Softball Canada is the governing body for the sport of Softball in Canada, providing softball opportunities for all Canadians, through the development, delivery and promotion of programs and services, both domestically and internationally.
- http://www.softball.ca/

International Senior Softball Association
- The ISSA promotes senior softball worldwide for men and women over the age of 50. They conduct the ISSA World Championships each year.
- http://www.seniorsoftball.org

SPN Slo-Pitch National
- Slo-Pitch National - Canada's largest adult slo-pitch organization, administering the Molson Slo-Pitch tournament program.
- http://www.slo-pitch.com/