Use an rtl2832 USB dongle to generate random data for the linux kernel
XOR Encryptor for Windows
IPsec / IKEv2-based VPN software for Linux.
NCrypted - simple file encryption software with GPU support
sha3sum - A demonstration of the Keccak permutation.
A family of small-state CSPRNGs and Stream Ciphers
A family of FLEA-inspired CSPRNGs and Stream Ciphers
SES brings back the uncrackable onetime pad, with a digital twist.
Simple, lightweight, standalone command-line single file encryption.
A free "on-the-fly" transparent disk encryption program for PC & PDAs.