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.

Team App - Team App is a platform that allows teams and groups to improve communication by creating their very own smartphone app.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

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

Bigtent - BigTent is a web-based organization and communication portal for groups.