Hamilton

The bay area and trolley tour

ADSB

Capturing Automatic Dependent Surveillance-Broadcast. Software defined radio to capture real time flight information above your head. Part of the Flightradar24, FlightAware, OpenSky Network

Power Monitoring

If you don't mind giving away your data, there are many home monitoring solutions. None seem to offer the features of the old TED or recently departed IoTawatt. Too bad the useful ones disappear.

Open Source Software

Software with source code that anyone can inspect, modify, and enhance. Control, security, stability. What's not to love about this community supported development software?