s-tui!

AIDA64 is a system information, diagnostics, and auditing application developed by FinalWire Ltd., that runs on Windows, Android, iOS, Windows Phone and Tizen operating systems. It displays detailed information on the components of a computer. Information can be saved to file in formats such as HTML, CSV, or XML.

Hardinfo is a system information and benchmark tool for Linux. It shows detailed system info, including hardware, environment, and kernel. It can use lm_sensors and ACPI for temperature and battery information. It also has four CPU banchmarks and two FPU benchmarks. It can generate reports as well.

Psensor is a graphical hardware temperature monitor for Linux. It can monitor the temperature of the motherboard and CPU sensors (using lm-sensors), the temperature of the NVidia GPUs (using XNVCtrl), the temperature of ATI/AMD GPUs, the temperature of the Hard Disk Drives (using hddtemp or libatasmart), the rotation speed of the fans (using lm-sensors), the CPU usage (since 0.6.2.10 and using Gtop2).

Lm-Sensors is a free and open-source application that provides tools and drivers for monitoring temperatures, voltage, and fans.