This article should be called "Some cool new GTD apps". David Allen was "digital" when he published his book. He purposely made GTD implementation-agnostic, and

This article should be called "Some cool new GTD apps". David Allen was "digital" when he published his book. He purposely made GTD implementation-agnostic, and personally used a Palm pilot. He sold (maybe still sells) a plugin for Outlook to make it more GTD-friendly.