iStat Menus - "An advanced Mac system monitor for your menubar."
HDD Led Indicator - This is a hard disk activity monitoring tool.
Process Explorer - The top window always shows a list of the currently active processes, including the names of their owning accounts, whereas the information displayed in the bottom window depends on the mode that Process Explorer is in: if it is in handle mode you'l…
Atlas Hard Drive LED - Atlas Hard Drive LED is a system tray utility program that allows the user to always be aware of whether their hard drive is reading or writing. The system tray icon will change to the color red when the selected hard drive is processing.
MenuMeters for El Capitan - MenuMeters for OS X El Capitan 10.11 (and later)
CoolTool - CoolTool is the new gen behavioral analytics platform that allows you to create catchy ads, engaging campaigns, strong brand, and effective website.