Which Trello power-ups do you use and for what?

Trello is the main planning tool at Bitium Agency. We use it for software development, decision-making, planning, marketing, content framework, etc. My favorite power-ups are Calendar Power-Up and Scaled by Screenfull. The calendar power-up adds a free calendar to each board, also you can connect it to google calendar. The scaled power-up adds many project management functions like card priority, dependency, etc. to boards. What are the ones that you find helpful?