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GlGameGui is a GNU Lesser/Library GPL-licensed simple user interface framework written in C++ and is based on the SDL library, the FreeType library and OpenGl. It is not a complex user interface, only has the basic functions mainly created for games.
This is a GUI library designed with the goals to be light, fast, flexible, portable, and to include all features expected from an advanced GUI. It's primarily designed for games with high demands on look and feel.
A C++ based framework for highly object-oriented cross-platform programming. Includes Thread, Processes,Filesystem access,GUI, etc. plus a set of generic utilities like Strings,Data structures,advanced debugging tools, etc.
Sakura is a Knowledge Navigator and User Interface for UNIX, which implements HyperMedia and its own windowing and packing system, both in the main program and in an extensive API for Tcl and other languages.
FXEX is an extension library to the FOX toolkit. It contains various widgets useful for FOX programmers. This library can be seen as an add-on to the FOX toolkit, but also as a preliminary development, as some widgets may find their way into FOX itself.
GrubC is a platform independent C/C++ graphic and GUI library with an object-oriented approach based on a Java Virtual Machine. By now AWT GUI functionality, 2D drawing and turtle graphic is supported.
PocketFrog is *THE* game library to rapidly write blazing fast games on the Pocket PC platform. It is implemented in C++ with an object oriented design. If your application needs to harness the raw power of your Pocket PC graphics, PocketFrog is for you.
The Netrinjo Engine is a SDL and OpenGL based game engine. It supports many classes for a graphical user interface, peer-to-peer and client-server networking and simple HTTP server functionality. Currently the engine is working under Linux.
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 with many features like colouring, customisable markup,
filterung, buffering, etc.
ACDK - Artefaktur Component Development Kit - is a platform independent C++-framework similar to Java or C#/.NET for generating distributed and scriptable components and applications.
Educational game framework supporting board games, strategy games, and other grid-based game boards. Currently uses Python/wxPython as the application language/library. C++ libs included to help create AI for the various games.
A library for the creation of cross-platform, GUI-independant wizards. Supports extensible front-ends, currently implementing HTTP and KDE, as well as extensible input types.
Legaya is a MicrosoftŽ DirectXŽ 9 compatible GUI framework for games and/or media applications. It contains a small garbage collector for unused controls and is highly flexible in event management.
Simple Linux implementation of Borland's conio (conio.h) library. It uses Ncurses. It includes most functions required to write a basic application using conioh (i.e. getch(), cprintf(), puts() and more).
Math2Braille converts MathML 2.0 files into the Braille Maths standard used in the Netherlands. The software has XML based schemas and descriptions to allow different protocols to be added for different countries/regions. Accessibility Mathematics Blind
libeasycgi is designed to be an easy to use and ASP-like library for CGI programming. It will provide an interface for CGI programming in an ASP style and tries to go beyond this. Also, it is designed to be easy for automated test on CGI programs.
BeGUI is an OpenGL-based GUI library aimed to general lightweight application development. It looks good, it's easy to use and is non-intrusive to your code.