Not really something I am especially interested in. We have our alt+f2 runner and Budgie Menu. For Budgie 11 I do want to have the option to have a full-screen application launcher for all the folks coming over from GNOME Shell, but that's about it. You're obviously welcome to develop one, or you could see if rofi (which is in the repo) would be customizable in that manner (would require some manual configuration and probably theming).
https://github.com/davatorium/rofi/wiki/Configuring-Rofi