liberror is a library for C and C++ that addresses the allegedly simply task of printing messages. It is essentially a feature-rich substitute for fprintf. Features include colours via ANSI mark-up, multiple error streams, report files, automatic error number assignment, filtering by number, subsystems, and groups, buffering with manual filtering and re-issuing, callbacks, error counters, time stamping, and message styles.
wxOptParse is a Python program that brings up a graphical representation of the command line options of a Python program, if it happens to use the standard optparse module. What this means is that if if you have a program that uses optparse you can optionally click on checkboxes, edit boxes, combo boxes, etc. instead of using the command line.
The OpenInput library is intended as a free (libre), easy-to-use, cross-platform input handler library. The goal is to provide an SDL-like interface to input devices such as keyboards, mice, and joysticks while keeping the dependencies for the library at a bare minimum and making it simple to integrate in existing projects. All functions and data structures are intuitive and fully documented. The library has support for both event-based input handling and unbuffered input.
reacTIVision is a computer vision framework for the fast and robust tracking of fiducial markers attached to physical objects, as well as for multi-touch finger tracking. It was mainly designed as a toolkit for the rapid development of table-based tangible user interfaces and interactive multi-touch surfaces such as the reacTable. Client application examples are available for various programming environments such as C++, Java, C#, Processing, PureData, Max/MSP, and Quartz Composer.
Wt is a C++ library for developing Web applications with an API that is widget-centric and inspired by existing C++ graphical user interface APIs. To the developer, it offers abstraction of Web-specific implementation details, increasing the accessibility and portability. Under the hood, the library uses the latest techniques (HTML5, Ajax, WebSockets) to handle user events and update the Web page.