The Ting Smart Sensor quietly monitors your home wiring for potential hazards. Here's how it fared in my house.

Your open-source stack doesn't have to fall apart. Chaingaurd EmeritOSS will patch dying tools - and prevent them from becoming security risks.

If a major disaster like Fukushima or Chornobyl ever happens again, the world would know almost straight away, thanks to an array of government and DIY radiation-monitoring programs running globally.