AWS Encryption SDK for C
Powerful webdav client and sync tools with client-side AES encryption
STROBE cryptographic protocol framework
Midbar is more than just an open source password vault!
Little program for encryption-decryption.
NCrypted - simple file encryption software with GPU support
High Security Encrypting File System
A Social Media Encryption/Decryption Tool
SES brings back the uncrackable onetime pad, with a digital twist.
xxteac - XXTEA Encrypter/Decrypter
Set of useful tools for payment service development