gmrun is a very featureful GTK+-2 Run box. Its features include:

	* Tilde completion
	* Completion for separate words
	* Cycleable command history
	* Configuration file in ${PREFIX}/share/gmrun/gmrunrc,
	  which can be copied to ~/.gmrunrc
	* Can spawn commands in a terminal
	* Intelligent URL handling

WWW: http://sourceforge.net/projects/gmrun/