i built a program that watches wifi traffic and if it sees my phone connected to the office wifi; it marks me as in the office on our internal chat tool (Zulip).

And the inverse as well, of course.

Runs on a raspberry pi that I was otherwise using to take backups periodically… has been working pretty good honestly.

I also built a program that fills/submits my time reports, and does the same for all of my subordinates - then signs them off… Saves everyone like 5 minutes if we remember to do it, or 12 minutes and frustration if we’re reminded by HR about it (which happens because who the hell cares about time reports?)