Is there a free/open software like this but for the entire desktop environment? I'm looking for something that is highly scriptable so I can have some simple ma

Is there a free/open software like this but for the entire desktop environment? I'm looking for something that is highly scriptable so I can have some simple magic phrases and link them to specific scripts If not, any non-free ones? (I know about Dragon but not much) I want things like "next" "back" "exit" kind of commands. If the trigger is there I can write the scripts myself. Ideally it would be context aware, so it could check if a browser is the active window, if yes "next" and "back" go to next and previous tabs or something. If IDE is active toggle through files, etc..