htop is an interactive system-monitor process-viewer. It is designed as an alternative to the Unix program top. It shows a frequently updated list of the proc…

Glances is a cross-platform system monitoring tool written in Python.

GNOME System Monitor shows you what programs are running and how much processor time, memory, and disk space are being used.

Resource Monitor a utility that displays information about the use of hardware (CPU, memory, disk, and network) and software (file handles and modules) resour…