Rofi
A window switcher, application launcher and dmenu replacement
...Rofi (renamed, as it lost the simple property) has been extended with extra features, like an application launcher and ssh-launcher, and can act as a drop-in menu replacement, making it a very versatile tool. Rofi, like dmenu, will provide the user with a textual list of options where one or more can be selected. This can either be running an application, selecting a window, or options provided by an external script. It's not an application that can support every possible use case. It tries to be generic enough to be usable by everybody. Rofi has several built-in modes implementing common use cases and can be extended by scripts (either called from Rofi or calling Rofi) or plugins.