Extremely fast non-cryptographic hash algorithm
Bug-fix-only libev port of shadowsocks
A simple, modern and secure encryption tool (and Go library)
Complete and free implementation of the OpenPGP standard
GnuPG for Windows
Keybase Go library, client, service, OS X, iOS, Android, Electron
transparently encrypt files within a git repository
Easy-to-use and powerful homomorphic encryption library
A high-level OpenPGP library
CLI wrapper around aws-encryption-sdk-python
AWS Encryption SDK for C
Secure software enclave for storage of sensitive information in memory
Open source disk encryption with strong security for the Paranoid
Sign PDF with Digital Signature Certificate
Secure communication software
57 Hash Functions In One Program, plus each with HMAC or KMAC
A simple file/folder encryption application based on the 7zip-full.
Open source file encryption software
antigift is simple cross-platform, files & folders encryption tool
STROBE cryptographic protocol framework
C++ cryptographic library (modern hash functions, ciphers, KDFs)
FinalCrypt - Unbreakable One-Time Pad Encryption
Stanford Javascript Crypto Library
FIDO strong authentication, encryption, digital signature engine