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

Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.

Heja - Easily communicate within your sports team

Galette - Galette is a membership management web application towards non profit organizations.

Sportlyzer - Sportlyzer is a player development and team management software for youth and amateur sports clubs. The platform connects coaches, managers, players and parents.

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