ScummVM is a program which allows you to run certain classic graphical point-and-click adventure games, provided you already have their data files. The clever part about this: ScummVM just replaces the executables shipped with the game, allowing you to play them on systems for which they were never designed!...

File tests each argument in an attempt to classify it. There are three sets of tests, performed in this order: filesystem tests, magic number tests, and language tests. The first test that succeeds causes the file type to be printed.
Starting with version 4, the file command is not much more than a wrapper around the "magic" library....

digiKam is an advanced digital photo management application for KDE desktop, which makes importing and organizing digital photos a "snap". The photos can be organized in albums which can be sorted chronologically, by directory layout or by custom collections....

The Advanced Linux Sound Architecture (ALSA) provides audio and MIDI functionality to the Linux operating system. ALSA has the following significant features:

• Efficient support for all types of audio interfaces, from consumer sound cards to professional multichannel audio interfaces. ...

The CommitMonitor is a small tool to monitor Subversion repositories for new commits. It has a very small memory footprint and resides in the system tray.

Metacity was the default window manager for the GNOME 2 desktop environment. Its focus is on simplicity and usability rather than novelties or gimmicks. Its author has characterized it as a "boring window manager for the adult in you. Many window managers are like Marshmallow Froot Loops; Metacity is like Cheerios."...

OGRE (Object-Oriented Graphics Rendering Engine) is a scene-oriented, flexible 3D engine written in C++ designed to make it easier and more intuitive for developers to produce applications utilizing hardware-accelerated 3D graphics. The class library abstracts all the details of using the underlying system libraries like Direct3D and OpenGL and provides an interface based on world objects....

SMSLib is a Java / .NET library for sending and receiving SMS messages via a GSM modems or mobile phones. SMSLib also supports a few bulk SMS operators.

Doctrine is an ORM (object relational mapper) for PHP that sits on top of a powerful DBAL (database abstraction layer). One of its key features is the ability to optionally write database queries in an OO (object oriented) SQL-dialect called DQL inspired by Hibernates HQL. This provides developers with a powerful alternative to SQL that maintains a maximum of flexibility without requiring needless code duplication....

Catalyst is an MVC framework for web development in perl, designed to save on wheel re-invention without getting in the way of architecting your application however is best suited to the problem domain and taking full advantage of the power of CPAN