Sometimes I still use WordPerfect 6 for DOS for writing text. It's insanely fast and, as other have said, the «reveal codes» feature is awesome. Unfortunately,

Sometimes I still use WordPerfect 6 for DOS for writing text. It's insanely fast and, as other have said, the «reveal codes» feature is awesome. Unfortunately, its equation editor is far more cumbersome than plain LaTeX for writing equations; I would love to use it for writing course notes and textbooks, but LaTeX is so convenient… In this regard, nothing beats Emacs+pandoc.