The Gnome runner and Krunner from KDE both do this. I'm not sure if the Gnome variant supports arbitrary commands like Krunner does, but they at least have opening applications, unit conversion, and web search.
He means something that can access all commands available in a given application, not a launcher.
Ubuntu's Unity has that, giving search access to all the menu entries in the opened application.
Sublime Text implementation is even more powerful, giving search access to all commands, and the list includes commands provided by extra packages added to Sublime.
So I can do, for example: 'ctrl+shift+p', install package, gitsavvy, <enter>; 'ctrl+shift+p', git diff current file, <enter>;
Seeing you get downvoted for asking genuine questions to a technical community reminds me that I need to find a new one. Stack Overflow 2.0, here we come.
No question now what has happened to the faces of the pigs. The creatures outside looked from pig to man, and from man to pig, and from pig to man again: but already it was impossible to say which was which.
