ObjectivePGP is an open-source library for iOS and macOS
A high-level OpenPGP library
Keybase Go library, client, service, OS X, iOS, Android, Electron
STROBE cryptographic protocol framework
Cross-platform GMSM Security Suite written in Go
A library for easy use of symmetric encryption and decryption in java
Stanford Javascript Crypto Library
FIDO strong authentication, encryption, digital signature engine
A Collection of Useful Java/Swing Code