I used the VoiceRecognition API to control my music player using voice commands - works great for cooking!

https://smalldata.tech/blog/2017/11/15/building-a-voice-assi...

I also wrote my own little VPN kill swtich - great for ensuring that my browser shuts down if the VPN dies.

https://smalldata.tech/blog/2018/04/11/building-a-vpn-kill-s...