Linux, but aspiring cross platform, successor to bar built on electron. It can be configured in yaml to display some system status information.

callahanrts/element

I spent some time setting up an Archlinux desktop with i3wm just for the fun of it. Since i3wm doesn’t have a very nice status bar by default, I created my own. Element is easily configured with yaml. You can create status bar widgets in coffeescript and style them with less.