Emacs Org mode has an outliner, wiki-like internal links, and nice GTD support, all stored in plain text files. I started using it recently and like it a lot.

Emacs Org mode has an outliner, wiki-like internal links, and nice GTD support, all stored in plain text files. I started using it recently and like it a lot. You'd have to learn Emacs if you don't already know it, but that's not hard (I used Emacs in law school when dinosaurs roamed the earth). http://orgmode.org/ http://orgmode.org/