Select2 - Select2 offers customizable select box with support for searching, tagging, infinite scrolling, and many other used options.
TeamPro - TeamPro is an online website that offers you an effective way to manage your sports team’s activities and events.
Selectize.js - Selectize is a custom <select> UI control with autocomplete and native-feeling keyboard...
TeamStats - TeamStats transforms football teams. A revolutionary football management & organisation platform used by teams and players around the world. Free signup.
Chosen - Chosen is a JavaScript plugin that makes long, unwieldy select boxes much more user-friendly.
Football Coach App - Football Coach App is a mobile application that you can use to manage multiple football teams.