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 - [keechain](https://github.com/yukibtc/keechain)![stars](https://img.shields.io/github/stars/yukibtc/keechain.svg?style=social) - Bitcoin application to transform your offline computer in an AirGap Signing Device (aka Hardware Wallet) with support to `NIP-06` and `NIP-26`.
 - [nostrum](https://github.com/nostr-connect/nostrum)![stars](https://img.shields.io/github/stars/nostr-connect/nostrum.svg?style=social) - Nostrum it's a mobile app that allows you to sign transactions and messages with your Nostr keys. Nostrum is the reference implementation for a remote signer app (ie. Wallet) of the Nostr Connect protocol.
+- [nostr-signing-device](https://github.com/lnbits/nostr-signing-device) -  Signing device for Nostr built on ESP32
 
 ## Vanity pubkey mining