Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Next Step for Trello - Check tasks directly from your Trello boards
GoodGantt - The best Gantt chart for Trello®
Standups - Web and mobile platform for daily video & voice stories, specially crafted for distributed & remote teams.
Paws for Trello - The best way to use Trello on your desktop
Remoty - Streamline HR Operations and Processes for Remote or Hybrid Workforces