I wrote my master’s thesis about the implementation and benchmarking of perceptual image hash functions. The proposed benchmarking framework for perceptual image hash functions (Rihamark) was published under the GPLv3. To learn more about Rihamark please visit the projects homepage.
pHash is an open source software library released under the GPLv3 license that implements several perceptual hashing algorithms, and provides a C-like API to use those functions in your own programs. pHash itself is written in C++.
IM-Filter is a daemon which runs on a Linux firewall and filters ICQ traffic.The daemon can identify filetransfers, handle UIN and word blacklists, manage a list with currently logged in users and log messages sent via the ICQ protocol.