htop

htop is an interactive process viewer for Linux. It is a text-mode application (for console or X terminals) and requires ncurses. htop is an interactive top replacement...

Free Open Source Mac Linux BSD

Atmonitor

Mac OS X System Monitor and Process Explorer Tool atMonitor is the most advanced monitoring tool for Mac OS X that displays system activity in real-time. It is designed...

• Discontinued The official website is no longer available. Last version, 2.7.1, released on August 2012, can be still downloaded from Wayback Machine.

Free Mac

psutil

psutil is a module providing an interface for retrieving information on all running processes and system utilization (CPU, memory, disks, network, users) in a portable...

Free Open Source Mac Windows Linux BSD

Iotop

Linux has always been able to show how much I/O was going on (the bi and bo columns of the vmstat 1 command). Iotop is a Python program with a top like UI used to...

Free Open Source Mac Linux

StatusPilatus

StatusPilatus Monitor your PC like never before! Features - Cross-platform and free Monitoring - CPU usage, flags and temperature - GPU information, with support...

Free Open Source Mac Windows Linux

iPulse

Using its concise and appealing user interface, iPulse graphically displays the inner workings of OS X on your desktop, menu bar or Dock.

Commercial Mac

px

px tells you what processes are running on your system and how they are interconnected.

Free Open Source Mac Linux BSD

Processes

Processes is a power tool to help you monitor and control the processes running on your Mac. It provides both a wide overview of the activity on your system, while also...

Commercial Mac

Tasks Explorer

Tasks Explorer is a freeware opensource computer program providing functionality for collecting extended information about processes running in system in real time. ...

Free Mac

MagicanLite

Magican Lite is a free system monitor utility. It could help users monitor CPU and memory usage, watch on download and upload speed and detect temperature of CPU and...

• Discontinued The company seems to be abandoned: no news since 2013. Last version, 1.0.0, released in April 2012, can be still downloaded from Apple Appstore.

Free Mac