WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.
TeamSnap - Sports Team, Club & League Management Software & Apps
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Team App - Team App is a platform that allows teams and groups to improve communication by creating their very own smartphone app.
Zulip - Chat for distributed teams. Zulip combines the immediacy of real-time chat with an email threading model. With Zulip, you can catch up on important conversations while ignoring irrelevant ones.
Jersey Watch - Jersey Watch is sports management software specially designed for the teams and leagues for organizing players, managing payments, and effective communication.