aXe is a simple to use text editor for X11 that represents a significant
improvement over xedit.  Also built around the Athena Text Widget it
features, amongst other things,
  o multiple windows, buffers
  o configurable menus, optional configurable button interface
  o provision for defining keyboard macros
  o file selection via a browser
  o parenthesis matching, regular expression searching
  o restricted or unlimited undo
  o ability to change font
  o both brief and comprehensive (hypertext) on-line help