Keep in Touch aims to be a secure IM system for multiple platforms. It supports its own XML-based protocol as well as ICQ and AIM (toc). It provides encrypted connections between the server and client aswell as encrypted chat on all supported networks. The client can store contacts on the server allowing users to keep their contact lists between different locations.
The RAZip bitstream format was designed to provide a faster random access to compressed data than what is currently possible using the GZIP format. Its major features include fast random access to compressed data, freedom from patents, single-pass coding/decoding using a bounded amount of intermediate storage, the ability to choose from one of many algorithms for compression, encryption, or error correction, and comprehensive support for Unix file metadata, Macintosh file metadata, and arbitrary file metadata.
StegFS is a steganographic file system for Linux. It offers security beyond that afforded by a regular cryptographic file system, since it not only encrypts data, but also provides a plausible deniability mechanism by securely hiding the data. It is designed to give the user a very high level of protection against being compelled to disclose its contents. StegFS extends the standard Linux file system (ext2fs), allowing normal and several levels of hidden files to coexist. This allows some data to remain hidden even if some of the keys are compromised.