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FpGUI

fpGUI, the Free Pascal GUI toolkit, is a cross-platform graphical user interface toolkit developed by Graeme Geldenhuys. fpGUI is open source and free software, licensed under a Modified LGPL license. The toolkit has been implemented using the Free Pascal compiler, meaning it is written in the Object Pascal language.

fpGUI consists only of graphical widgets or components, and a cross-platform 2D drawing library. It doesn't implement database layers, 3D graphics, XML parsers etc. It also doesn't rely on any huge third party libraries like GTK or Qt. All the extras come straight from what is available with the Free Pascal Component Library (FCL) which comes standard with the Free Pascal compiler.