|Description||show a navigation bar|
|Part of Emacs||yes|
Speedbar is another frame which displays information about the current buffer, allowing you to better navigate your sources. It is a part of GNU Emacs since version 23.2.
Speedbar can use etags, imenu,… to parse C, C++, Java, texinfo, Makefiles, etc. and provides alternate views into each individual files. For example, for C files, function list and variable lists are provided for quick navigation within files.
Call M-x speedbar, it will launch the speedbar in a different frame. To automatically launch speedbar at startup, add this in your ~/.emacs :
If you don't want to launch it when you use emacs in console :
(when window-system ; start speedbar if we're using a window system (speedbar t))
 See also
sr-speedbar (available with package.el) is a speed bar in the same frame.
See also project-explorer, a full-featured tree project explorer (available in ELPA)
emacs-nav is a simple in-frame file-system navigation bar.
Ztree consists of two utilities. ztree-dir permits to browse a directory as a tree and ztree-diff is to diff two directories. See github page for explanations and screenshots.