If you are tired of browsing through your files or the menu to find and open an application you do not use regularly or if you just want to speed up the process of opening a program, there is an application for the Gnome Desktop called GNOME Do which you might like.
Install it as usual with your package manager and start it. To call the execution bar, press SUPER (Windows Key on Windows keyboards) + Space and enter the name or parts of the name of any application, script or executable.
If it is not the desired app that is proposed, you can browse the other possibilties with the Up- and Down- keys. To cancel the bar, hit ESC and to execute the displayed program hit Enter.