Joachim Heintz very correctly pointed out on the Csound emailing list that the syntax highlighting text editor cseditor which is part of the canonical source base somehow did not make it back into the installers.
My guess is that changes in the SConstruct file have made including the cseditor binary on all platforms in the installer a problem. I will look into that and commit the changes.
For now, this is a binary for users of OSX, since Joachim Heintz brought it up. It also includes the source code and will compile on all platforms simply using the commandline
$ fltk-config --compile frontends/cseditor/cseditor.cxx
from the root directory of the CVS source code tree. For example, from a fresh checkout.
Hopefully this helps to obviate some confusion surrounding a lightweight, portable, and compact solution for a Csound syntax highlighting text editor.
NOTE that since .cxx files are not uploadable to this blog, it may be necessary to rename cseditor.cxx.txt to cseditor.cxx