Rocket is an application launcher for KDE Plasma. It sorts all of your applications in a horizontal grid alphabetically, so you will always find what you are looking for at first glance. No more menu navigation, only scrolling.
Customizable row and column sizes
Search for keywords (such as "file manager")
Scroll support for touchpad, mouse and the mouse wheel
Please send in bug reports, development is still in early stage*. It has been tested on Kubuntu, but it should also work on any platform with KDE installed.