Emacs can be very visual if you use ECB (check http://emacsonrails.drozdov.net screencast for an example):

a) A directory tree b) a list of source files in the current directory c) 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 ECB too) d) a history of recently visited files, e) the Speedbar (directory hierarchy) and f) output from compilation (the “compilation” window) and other modes like help, grep etc. or whatever a user defines to be displayed in this window.