We use Drupal.
Our new website that we made last year, as well as our newer new one for this year, were both made with Drupal. We previously used Wordpress, but found that we didn't get all of the functionality that we wanted. After a bit of brainstorming, our website now has user accounts for team members, parents, and mentors. We have private news pages, private calendars, as well as calendars to sign up for work shifts and after school dinners that we offer. We have private rosters with contact information and sub-team lists. Our team is growing substantially, and we're hoping that our updated website will help us to organize and manage it better.