Do you want to browse through the compete list of paid menu bar apps? Here you go!
Collection:
Developer Apps
ContriBar
ContriBar displays your Github contribution calendar right in your Mac’s menu bar.
Collection:
Window Managers
Front and Center
This menu bar app lets you control the window-layering policy on your Mac. In “Classic” mode, clicking on a window brings all the windows in that app to the front, just like it did in classic Mac OS. In “Modern” mode, only the clicked window comes to the front.
Collection:
System Tools