arandr - ARandR is designed to provide a simple visual front end for XRandR.
CPU Frequency Selector - Cinnamon CPU Frequency Selector Applet
driconf - DRIconf is a configuration applet for the Direct Rendering Infrastructure.
SiSoftware Sandra - SiSoftware Sandra (the System ANalyser, Diagnostic and Reporting Assistant) is an information &...
Glxinfo - glxinfo is a command-line tool that can help you diagnose problems with your 3D acceleration setup.
PC Wizard - THIS SOFTWARE IS NO LONGER MAINTAINED.PC-Wizard is an utility designed to analyze and benchmark your computer system. CPU and memory subsystem (caches, RAM ...). Graphics and video. Hard disks, CD/DVD, Removable/FLASH medias.