This is a very simple and easy-to-use key/wallet generator for Bitcoin (BTC) and Ethereum (ETH). It's implemented in Golang and incorporates the BIP32, BIP39, BIP43, BIP44, BIP49, BIP84, BIP86, BIP173...
An EIP55 compatible address encoding library
An Ethereum EIP-55 address encoder and validator in Elixir.