jsrsasign
opensource free pure JavaScript cryptographic library supports RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp and CAdES and JSON Web Signature(JWS)/Token(JWT)/Key(JWK)
@trust/keyto
A utility for translating cryptographic keys between representations
node-webtokens
Simple, opinionated implementation of JWS and JWE compact serialization
ts-jose
Wrap functions of JOSE in steady interface