Distributed bug tracking systems

source code management software

Org Mode (also: org-mode; ) is a mode for document editing, formatting, and organizing within the free software text editor GNU Emacs and its derivatives, designed for notes, planning, and authoring. The name is used to encompass plain text files ("org files") that include simple marks to indicate levels of a hierarchy (such as the outline of an essay, a topic list with subtopics, nested computer code, etc.), and an editor with functions that can read the markup and manipulate hierarchy elements (expand/hide elements, move blocks of elements, check off to-do list items, etc.).

distributed version control system, bug tracking system and wiki server

ikiwiki is a free and open-source wiki application, designed by Joey Hess. It is licensed under the terms of the GNU General Public License, version 2 or later. ikiwiki is written in Perl, although external plugins can be implemented in any language.