TeamSnap - Sports Team, Club & League Management Software & Apps
ActivityTracker - Auto step counter/pedometer for Android, iPhone, or Watch
Spond - The easiest way to organize team sports or other type of group activities
Flöckbud Sports App - Meet other athletes, create & join workouts, discover flocks
Fullcourt - The social network for basketball players
Tep - Fitness tracker meets tamagotchi. Don't starve it!