scryptsy(latest: 2.1.0) Pure JavaScript implementation of the scrypt key deriviation function that is fully compatible with Node.js and the browser.
bip39(latest: 3.1.0) Bitcoin BIP39: Mnemonic code for generating deterministic keys
eckey(latest: 1.0.2) Handle private key and public keys associated with elliptic curve cryptography. Used with crypto currencies such as Bitcoin, Litecoin, Dogecoin, etc. Works in both Node.js and the browser.