Is there a menu bar tool which will let me eject external drives easily? I usually have a lot of external drives connected to my MacBook, such as flash drives, hard drives, and SD cards. It so happens that I need to eject them quite often.

The usual way I eject these is by either showing the desktop using a shortcut and dragging the drives I want to eject to the trash, or navigating to the finder and ejecting the drives from there, or by using a script which ejects all my external drives at once. However, when I want to do something simple like ejecting a flash drive or SD card (which I do quite often) I'd prefer not to break my workflow and simply be able to, say, click on a menu bar icon and select which volume I want to eject.

I haven't yet seen a utility which can achieve this. Does anyone know of one?
Try Semulov - it is designed to eject volumes from the menu bar. The author has even made the source available on GitHub.