Org-mode

Org-mode (also: Org mode) is an editing and organizing mode for notes, planning, and authoring, in the free software text editor Emacs. It is characterized by a flexible and versatile system which adapts to various workflows, simple and complex, and by an extensive and extensible function (structured text editing, personal organization, web publishing, programming, etc.), which can integrate with a large variety of external systems and resources.
Org-mode was created by Carsten Dominik in 2003, originally to organize his life and work as a scientist, and since the first release numerous users and developers helped him to improve this free software package, which has grown to over 120,000 lines of code. Org-mode is part of Emacs as a major mode — although it is also released separately, and newer versions of Org-mode than the ones shipped with Emacs are often available. Dominik is the current maintainer, in cooperation with an active development community....