A compact, easy-to-use firewall/router. Can be powered through USB-C, so it's highly portable. The hardware isn't cheap, but it's worth it. I've been working with computer networks for over 30 years ...

Thanks to this tool, my Raspberry Pi lets me know the second a new device joins my network, which makes my whole setup easier ...

You can plug in your phone, download an emulator, or install the Google Play Store to access Android apps on your computer. Some tinkering may be required.