MicroMenuCal is a simple flyout calendar and menu bar clock replacement that includes functionality that isn’t built into macOS. It’s similar to Day-O but works in Big Sur, which Day-O has some issues with.
Show/hide your Mac’s battery icon when you want. This menu bar app also shows the statuses of your Bluetooth Apple products.
Edit and write text in the menu bar. Easily and on the go, while doing other things on your Mac at the same time. The menu bar window is resizable.