For LNURL based hardware (although you could use for software), people build things like bitcoin switches, Points of Sale, and ATMs.
- LNPoS: https://lnbits.github.io/lnpos
- bitcoinSwitch: https://github.com/lnbits/bitcoinSwitch
- FOSSA: https://github.com/lnbits/fossa
- BATM: https://github.com/lnbits/fossa
- OfflineSwitch: https://github.com/lnbits/fossa