StegoTool is a steganography and steganalysis application and development framework developed in Python.

You can use a number of pre-implemented steganographic algorithms to embed data both in the spatial and frequency domain of images. These algorithms range from simple LSB substitution to more advanced algorithms such as F5 which manipulate DCT coefficients of JPEG files.
StegoTool also includes many steganalysis algorithms which detect if an image has been tampered with.
All implemented algorithms are part of a plugin infrastructure which makes it easy to extend StegoTool by writing custom plugins which may implement a steganographic or steganalytic algorithm.

The GUI makes it easy to load/use plugins and also provides much more functionality such as storage for frequently used files (media pool) and commonly used image operations like computing (DCT) histograms and difference images.

To enhance security, data can also be encrypted before embedding using different encryption algorithms such as RC4 and a DES variant.