Emacs.. META-F and META-B do just that. And META-D removes the entire word. Replace CTRL for META and you do one character instead of one word. That mapping

Emacs.. META-F and META-B do just that. And META-D removes the entire word. Replace CTRL for META and you do one character instead of one word. That mapping alone makes learning Emacs bindings worth it. Most editors can be configured to honor them.