PlannerMode is a Personal Information Manager for Emacs.
There's a lot of great info about Planner at the EmacsWiki/PlannerMode. The Planner community homepage is Planner Love, where you can download the package. There are also detailed installation instructions there, as well as tips for using Planner with GTD.
- Planner.el—and many other Emacs plugins—are a breeze to install on any Debian based distribution:
apt-get install planner-el
- Sacha has a great manual that shows the power of planner and it's buddies EmacsWikiMode and RememberMode.