Hidden Bar - A ultra-light MacOS utility that helps hide menu bar icons.
DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.
Hocus Focus - A Mac menu bar utility that hides your inactive windows
CleanMyMac X - Clean, protect and speed up your Mac
Vanilla - Vanilla is a free Mac app that lets you hide icons from your menu bar.
MacFly Pro - Smart assistant for better Mac performance