TeamSnap - Sports Team, Club & League Management Software & Apps

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

SportsSignupPlay - SportsSignupPlay is one of the leading team & league management system that lets schedule calendars, communication, Roaster, and many others, making the coaches connect with you sports families.

GroupSpaces - Free Group Website, Membership Database, Listserv Mailing List, Online Group Management Software : GroupSpaces

Jersey Watch - Jersey Watch is sports management software specially designed for the teams and leagues for organizing players, managing payments, and effective communication.

The Groups Place - The Groups Place is a new alternative to Meetup.