These menu bar apps allow you to keep track of your system statistics in real time.
Stats Panel
Stats Panel is a customizable system monitor for your menu bar. It has an adaptive UI which changes with the theme of your Mac.
Swifty Stats
This menu bar app is designed for indie app developers. It provides easy access to your recent installation data from App Store Connect.
Usage
A menu bar app to track your system’s activity and performance. You can buil the Menu from 30+ components.
Particulars
This menu bar app displays your Mac’s computer name, model name, serial number, CPU, RAM, graphics card, OS version, Server version, current user, uptime, disk space, and network configuration.