Free qt 4 software for linux

PyQt is a set of Python bindings for the Qt toolkit. The bindings are implemented as a set of Python modules: qt, qtcanvas, qtgl, qtnetwork, qtsql, qttable, qtui and qtxml, and contains 300 classes and over 5,750 functions and methods.
PyQt also implements the qtext Python module. PyQt contains bindings for QScintilla witch is the Qt port of the Scintilla programmers editor class.
PyQt is licensed under the GNU GPL (for UNIX/Linux and MacOS/X), under the Qt Non-commercial License (for use with the Qt v2.3.0 non-commercial version for windows), under the Qt Educational License (for use with the educational edition of Qt for Windows), and under a commercial license (for Windows, UNIX/Linux and MacOS/X). You can purchase the commercial version of PyQt here.
There is also an evaluation version of PyQt for Windows. This must be used with the corresponding evaluation version of Qt.
PyQt supports Qt versions 1.43 to 3.3.4 and Python versions 1.5 to 2.4. PyQt will normally work with newer versions of Qt and Python without change. If changes are required then these are normally added to snapshots within a few days. PyQt has been ported to Windows, MacOS/X and UNIX/Linux.
Note that PyQt does not yet support Qt v4.
PyQt has also been ported to Qt/Embedded and supports the Qt Palmtop Environment (aka Qtopia) through the qtpe Python module.
Binary packages of PyQt are provided for the non-commercial, educational, and evaluation versions of Qt for Windows.
The GPL version of PyQt is included with most of the main Linux distributions.
PyQt brings together the Qt C++ cross-platform toolkit and the cross-platform interpreted language Python.
Qt is primarily a GUI toolkit. It has a comprehensive set of widgets modelled as C++ classes including a fast canvas widget and a rich-text editor. Qt also includes many other useful classes implementing, for example, access to SQL databases and an XML DOM parser.
Qt classes employ a signal/slot mechanism for communicating between objects that is type safe but loosely coupled making it easy to create re-usable software components.
Qt also includes a graphical user interface designer and an associated utility uic than converts a design into the corresponding C++ code.
Python is a simple but powerful object-orientated language. Its simplicity makes it easy to learn, but its power means that large and complex applications can be created. Its interpreted nature means that Python programmers are every productive because there is no edit/compile/link/run development cycle.
Much of Pythons power comes from its comprehensive set of extension modules providing a wide variety of functions including HTTP servers, XML parsers, database access, data compression tools and, of course, graphical user interfaces.
Extension modules are usually implemented in either Python, C or C++. Using tools such as SIP it is relatively straight forward to create an extension module that encapsulates an existing C or C++ library. Used in this way, Python can then become the glue to create new applications from established libraries.
PyQt combines all the advantages of Qt and Python. A programmer has all the power of Qt, but is able to exploit it with the simplicity of Python.
PyQt includes pyuic which takes the same designs that uic converts to C++, but converts them to the equivalent Python code. This makes PyQt particularly useful as a rapid prototyping environment for applications that will eventually be implemented in C++.
Enhancements:
- This release adds support for Qt v4.3.0.
- It supports the pickling of many Qt classes and enums.
- It supports partial functions as slots.

FakeBold Font patches for QT 4.3.x fake a bold font style and output for some fonts without bold support.

It is specially and very useful for CJK fonts. actually it works with all fonts without bold style.

Here I use FT_Glyph_Embolden to get a bold glyph.

These patches is not related to font rendering result, if you want to control font rendering result, please control fontconfig configurations.

Screenshot1: shows bold/bolditalic support with "SOng" and "Hei" Chinese font.

Screenshot1: shows bold/italic support for Chinese,Korean,Yi,Tibetan with Sans fontset(Song,SIL Yi, Tibetan machine uni fonts)

PHP-Qt library is an extension for PHP 5.1 that makes it possible to write software with the Qt toolkit.

It provides an object-oriented interface to the Qt 4 framework.

gtk-Qt provides helper functions to use Qt together with GTK.

Creditor 0.4 offers you a n excellent and powerful Qt4 financial calculator which is veru useful for credit payments! Creditor is a finacial program that can calculate credit payments (monthly payments) for you. Simple, and it just works!

Enhancements: Some small bug-fixed

qmdilib is a simple mdi library for Qt 4. The goal of this project, is to provide an easy way to modifying menus and toolbars of windows on demand.
This can be used to present different menus and toolbars to widgets inside a QTabWidget, hiding or showing a different set of menus on demand or even enabling a small plugin system.
The library is fully documented, and contains some demostrations. It should compile flawlessly (no warnings) with a single "qmake; make" on the root directory of the project.
qmdilib library is known to work on Windows and Linux, and there is no reason why it should not work on other platforms supported by Qt4. Currently only gcc is tested, but other compilers should be able to compile this library
Enhancements:
- Documentation re-created using doxygen 1.4.7
- code refactoring: qmdiClient - qmdiServer is now a public member
- new feature: qmdiActionGroup - added support for submenus
- new feature: qmdiActionGroup - added support for adding QActionGroup
- new feature: qmdiActionGroup - merge points are computed at run time from list of added groups
- code refactoring: qmdiHost - updateGUI can has been updated, see documentation
- code refactoring: qmdiServer - a lot of functions moved from qmdiTabWidget
- code refactoring: qmdiTabWidget contains less implementation details (see qmdiServer)
- code refactoring: qmdiTabBar has been removed, qmdiTabWidget uses an event filter now
- new demo: plugin demo is working now, soon to be ported to the main library

Qt-XMMS is a plugin for XMMS that plays Qucktime movie files (excluding Sorenson).