qDo (queue do) is a Slack extension that allows you to reserve time slots for deep, focused work similar to Pomodoro technique, but in the same time allows your team members to create tasks for you or ask you questions without distracting you. When a team mate creates task for you through qDo, they will be notified when you are available, so they can plan their work accordingly. Once your reserved time is up, you'll be notified about the tasks and questions.