SilentEye
SilentEye by Anselme Chorein is a cross-platform steganography program that hides text or a single file in BMP, JPEG, and WAV files
Supports Win32, Mac OSX, and Ubuntu Linux
Plugin architecture allows new formats and encryption to be supported
AES encryption and zlib compression
JPEG settings are Luminance interval (k), JPEG Quality %, Header position (top, bottom, signature), Passphrase (this is separate from encryption)
BMP settings are Image quality %, Used pixel color (R, G, B), Data distribution mode (equidistribution, inline), Header position (top, bottom, signature), bit(s) per pixel per color (1-6)
WAV settings are Sound quality %, Used channels (1,2), Data distribution mode (equidistribution, inline), Header position (beginning, ending), bit(s) per sample per channel (1-6)