Logwatch analyzes and reports on unix system logs. It is a customizable and pluggable log monitoring system which will go through the logs for a given period of time and make a customizable report. It should work right out of the package on most systems.
OpenStego Free Steganography Solution 0.8.1
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OpenStego is a tool implemented in Java for generic steganography, with support for password-based encryption of the data. It supports plugins for various steganographic algorithms (currently, only Least Significant Bit algorithm is supported for images).