Whit Jackson made one that appears to be made using HTML/Javascript (GitHub link). He also had a web site where you could generate the addresses client facet, but it seems being down now. vanityssh-go helps you to generate ED25519 private keys with vanity public keys - GitHub - danielewood/vanityssh-go: vanityssh-go https://trx52951.blog-a-story.com/9336078/not-known-facts-about-eth-vanity-address-generator-gpu