OpenPuff is described as 'Professional steganography tool:
HW seeded random number generator (CSPRNG)
Deniable steganography
Carrier chains (up to 256Mb of hidden data)
Carrier bits selection level
Modern multi-cryptography (16 algorithms)
Multi-layered data obfuscation (3 passwords)
X-squar' and is an app. There are eight alternatives to OpenPuff for a variety of platforms, including Windows, Linux, Web-based, BSD and Java apps. The best OpenPuff alternative is Openstego, which is both free and Open Source. Other great apps like OpenPuff are Steghide, east-tec InvisibleSecrets, Our Secret and SSuite Picsel Security.