AppLogger is a library that allows an application programmer to provide run-time customizable output from an application. It includes a function, applogger_log(), with calling semantics analogous to the standard C library's printf(), but with extra arguments to specify a classification for the output message. Calls to applogger_log() thus specify the classification and text of a message; calls to other functions in the AppLogger library determine the real-time policy applogger_log() applies to messages of a given classification: print to file, send over a network socket, ignore the message, etc. In short, AppLogger allows for the separation of message content and message output policy in an application.
Jmx4Perl provides an alternate way of accessing Java JEE Server management interfaces that are based on JMX (Java Management Extensions). It is an agent-based approach where a small Web application deployed on the application server provides HTTP/JSON-based access to JMX MBeans registered within the application server. It is set up from a handful of Perl modules, which can be integrated seamlessly in your own programs. It also includes a Nagios plugin, check_jmx4perl, a jmx4perl command line tool for remote JMX queries and operations, and a readline-based JMX shell j4psh, with context sensitive command completion and syntax highlighting.
pHash is an implementation of various perceptual hashing algorithms. A perceptual hash is a fingerprint of a multimedia file derived from various features from its content. Unlike cryptographic hash functions that rely on the avalanche effect of small changes in input leading to drastic changes in the output, perceptual hashes are "close" to one another if the features are similar. Potential applications include copyright protection, similarity searches for media files, or even digital forensics.