Tennis Ambassadors Christian Ministry
- Linking players in over 75 nations.
- http://www.tennisministry.org/

Creyda
- Info about amateur tennis tournaments, events and tennis ranking for amateur players
- http://www.creyda.com

Tennis Thing
- Video tips, drills, lessons, motion analysis, technical forums, journals and photo galleries. Interact with tennis coaches in real-time.
- http://www.tennisthing.com

International Tennis Number On Court Assessment
- A system for players to track and chart their own development and improvement as well as compare their score to other players from around the world.
- http://www.oncourtassessment.com

Tennis Welcome Centers
- A directory of facilities screened by the Tennis Industry Association that provide programs targeted towards new players. User can search for local parks and clubs providing lessons by zip code.
- http://www.tenniswelcomecenter.com

Tennis Mates
- A free tennis player matching service designed to match tennis players of all skill levels and all locations throughout the world.
- http://www.tennismates.com

MyTenniscenter.com
- Player registration service to match user with the right playing partners.
- http://www.mytenniscenter.com

TennisRank
- An automated system of tennis ladders that allows recreational players to set up match via the Internet.
- http://www.tennisrank.com

Tennis League
- A semi competitive league with competitions held throughout the United States. Uses the USTA NTRP ratings to match players.
- http://www.tennis-league.com

Tennis For Everyone
- Free listing service that set up tennis matches amongst amateur players.
- http://tennisforeveryone.com

Word Team Tennis Recreation Program
- A recreational league founded by Billie Jean King in 1974. Provides signup information, news, and rules.
- http://www.playwtt.com/

TennisEngine.com - Online Ladder System
- Computerized tennis ladder system that offers three ranking methods: quality based ranking system ideal for closed leagues, a more casual 20 point league system, and a traditional tiered ladder.
- http://www.tennisengine.com

The Tennis Information System
- Extensive collection of statistics and data relating to various amateur tournaments, rankings, and ratings.
- http://www.tennisinformation.com/

Spring Tennis league
- Find tennis players in a tennis league based in your city, within your level, age and experience.
- http://www.1stserve.com/