From Lazarus-ccr

fpGUI is a widgetset completely written in Object Pascal. It links directly with the underlying windowing system (Xlib, GDI), and thus avoids the need for many large external libraries (eg: Qt, GTK etc). The main design goal is to get a consistent look and behaviour across platforms.

fpGUI Toolkit homepage:

• http://opensoft.homeip.net/fpgui/

See also

• http://wiki.lazarus.freepascal.org/fpGUI_Interface