Android

Flows for Automate app (free, both Flows require Automate to be set as your phone assistant)

• Display control - Android Assistant / Home-Button - Toggle display-brightness with "Launch Android Assistant" key (home-button long press)     between 3 brightness levels depending on brightness-sensor input-level)

• Launch "Perplexity.ai - Ask Anything" free improved GPT-3.5-with-browsing app as phone assistant

Windows

• Networx 5.5.5 (last freeware version) - view network traffic in taskbar. Read more here

• CrystalDiskInfo @ sourceforge.net

• CoreTemp - view realtime CPU temperature, frequency, power draw and more

• Macrium Reflect Free Edition - live disk cloning - freeware version v8.0.7279 x64 @ archive.org

• Ventoy open source tool to make multiple ISO/WIM/IMG/VHD(x)/EFI images bootable on a USB drive @ventoy.net

• Sergei Strelec's WinPE (search on Google)