Complete and free implementation of the OpenPGP standard
Extremely fast non-cryptographic hash algorithm
AWS Encryption SDK for C
Bug-fix-only libev port of shadowsocks
Open source disk encryption with strong security for the Paranoid
Encrypted volumes through command line
57 Hash Functions In One Program, plus each with HMAC or KMAC
STROBE cryptographic protocol framework
One-time-pad encryption using a virtual pad
Leet is CCEx's software application for on-the-fly encryption (OTFE).
XOR Encryptor for Windows
NCrypted - simple file encryption software with GPU support