Hardware & software:
- F-Secure XFENCE at https://campaigns.f-secure.com/xfence/ for free (beta) from Leo Laporte.
- DeckSet App (for Mac) at https://www.decksetapp.com for $29.99 from Andy Ihnatko.
- Apple AirPods at https://www.apple.com for $159 from Andy Ihnatko.
- BatteryPro at https://www.elevationlab.com for $99 from Rene Ritchie.