Some additional repos to consider:
kennylevinsen/ecies — Curve25519 ECIES
go-ecc — Elliptic Curve Cryptography in the Go Programming Language. (ECIES)
arstd/ecies — ECC Encrypt and Decrypt, or Elliptic Curve Integrated Encryption Scheme(Fork from github.com/ethereum/go-ethereum/crypto/ecies)
Once a week...... I send out a list of most interesting Go libraries and apps.
Want to get it?