原始网址是http://qt-project.org/wiki/Category:Add-ons
希望需要的同学可以去看看，可以省下很多时间

Add-ons
These are third party add-ons and libraries for Qt:
Open Source License:

Third party add-ons and libraries under open source licenses:ProjectDescriptionLicense TypeGLC_libC++ library for high performance 3D application based on OpenGL and Qt4 GUILGPLlibircclient-qtIRC client implementation. Used by open source ComuniLGPLQextSerialPortProvides an interface to old fashioned serial portsMITQTermWidgetQt-based console similar to Konqueror; runs on Qt/EmbeddedGPLQwtQt Widgets for Technical Applications (2D plots, sliders, dials, compasses, thermometers, …)Qwt Licenseqtoolboxqtoolbox is a set of tools for everyday Qt development. A “swiss army knife”. Designed to be minimalistic, does “just what promised, nothing more”Apache License Version 2.0Qt Cryptographic ArchitectureQCA aims to provide a straightforward and cross-platform crypto API, using Qt datatypes and conventions which allow to cypher with RSA, AES, Blowfish, etcLGPLQScintillaadd-on which allow to highlight syntax in Qt-applications (port from Scintilla with more Qt-like API)LGPLQJsonQJson a easy way to manage JSON in QVariant/QVariantMap/QVariantListLGPLQuaZIPQt wrapper for zip/unzip packageGPL, LGPLLog4QtQt port of the Apache Software Foundation Log4j packageApache License Version 2.0Log4Qt forkQt port of the Apache Software Foundation Log4j package, Extension of the original Log4Qt project (SimpleTimeLayout, SignalAppender, DatabaseAppender, DatabaseLayout , Telnet appender, ..)Apache License Version 2.0LibQxtLibQxt is an extension library for Qt providing a suite of cross-platform utility classes to add functionality not readily available in Qt (Logging Framework, Web Service Framework, etc.)Common Public License v1.0, LGPLQxOrmQxOrm is a C++ library designed to provide Object Relational Mapping (ORM) feature to C++ and Qt users (persistence, serialization, reflection)LGPLQSerialDevicecross-platform library for serial devices based on Qt4 (is frozen, see new QtSerialPort)GPLQtSerialPortadd-on tools for Qt4/Qt5, which provides a single interface for both hardware and virtual serial portsLGPLKArchiveGzip/bzip2 compression QIODevice, and support for ZIP, TAR, AR and 7Zip archivesLGPLNovilePort of Ace source code web editor to Qt via Qt WebKit. Has API wrapper with properties and signals&slotsLGPL
Commercial License:

Third party add-ons and libraries under commercial licenses:LibraryDescriptionDual LicensingQicsTableHigh Performance Table for QtNoQtitanRibbonRibbons under QtNoQtitanDataGridData grid library for large dataNoQtitanMultimediaAdds multimedia technologies (Adobe Flash, …) to QtNoQ7GoodiesProvides Windows 7 features like jump list, taskbar thumbnails, thumbnail toolbar and more in a Qt wayNoKD ToolsProvides a number of easy-to-use widgets and non-gui classesYes (Commercial / GPL / LGPL)KD ChartCreates business charts (Stock Charts, Gantt, etc.), utilize the Qt Model-View modelYes (Commercial / GPL)KD ReportsGenerates printable and exportable reports from code and from XML descriptions. Can use Qt Model-View modelsYes (Commercial / GPL)KD SOAPA tool for creating client applications for web services, and service implementationsYes (Commercial / GPL / LGPL)NCReportIs a report generator (SQL or file based) with GUI designer, supports several output formatsNo