Flashlight - Control your Mac with a keystroke.
Yad - Yad (yet another dialog) is a fork of Zenity with many improvements, such as custom buttons...
Tiny Flashlight + LED - Tiny Flashlight + LED is free to use application that can be used anywhere else, having nicely built-in functionality.
Glade - Glade is a RAD tool to enable quick & easy development of user interfaces for the GTK+ toolkit...
Torchie - Touch to Torch
wxFormBuilder - wxWidgets is an excellent framework that enables the creation of multi-platform applications with...