geOps offer geo-localized solutions like this live tracker.
https://tracker.geops.ch/
Norbert Landsteiner a.k.a. Masswerk created this virtual punch card writer and reader.
https://www.masswerk.at/card-readpunch/
I wonder what else was in Leonardo DaVincis drawers.
https://www.popularmechanics.com/technology/infrastructure/a29426711/da-vinci-bridge/
If you're in need of a startup idea, here are 18.5K suggestions. Now, if you'll excuse me, I need to run a markov chain on these.
https://unawaz.github.io/stochastic-hill-climbing/tasks/