Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
iStat Menus - "An advanced Mac system monitor for your menubar."
HWiNFO - Professional System Information and Diagnostics. Comprehensive Hardware Analysis, Monitoring and Reporting for Windows and DOS. FREEWARE. download. Advertisements.
Process Explorer - The top window always shows a list of the currently active processes, including the names of their owning accounts, whereas the information displayed in the bottom window depends on the mode that Process Explorer is in: if it is in handle mode you'l…
AIDA64 - AIDA64 is a system information, diagnostics and benchmarking solution for Windows PC.
MenuMeters for El Capitan - MenuMeters for OS X El Capitan 10.11 (and later)