ECB stands for "Emacs Code Browser". While Emacs already has good editing
support for many modes, its browsing support is somewhat lacking. That's
where ECB comes in: it displays a number of informational windows that allow
for easy source code navigation and overview.
The informational windows can contain:
* A directory tree,
* a list of source files in the current directory,
* a list of functions/classes/methods/... in the current file, (ECB uses
the Semantic Bovinator, or Imenu, or etags, for getting this list so all
languages supported by any of these tools are automatically supported by
* a history of recently visited files,
* the Speedbar and
* output from compilation (the compilation window) and other modes like
help, grep etc. or whatever a user defines to be displayed in this
As an added bonus, ECB makes sure to keep these informational windows
visible, even when you use C-x 1 and similar commands.
It goes without saying that you can configure the layout, ie. which
informational windows should be displayed where. ECB comes with a number of
ready-made window layouts to choose from.