Gkey is a simple vaultless password manager in Go. It's generating sha256 sum of password + "-" + realm combination. And with that sum gkey generating secure password.
gkey -r github.com -p my-super-secure-master-password
# 6a?_#ZH$kVtB,P*!-p <master password> - master password which will be used to generate other passwords
-r <realm> - any string which identifies requested password, most likely key usage or resource URL
-l <length> - number of characters in the generated password (default 16 )
inspired by https://github.com/cloudflare/gokey