A plugin for gedit, that supports insertion of any
Unicode special symbol is available.
Implemented in Python and comes with default set for Hebrew
diacritical marks
ניקוד, טעמי מקרא ...
Bidirectional control-codes,
Read more at
  http://live.gnome.org/Gedit/Plugins
  http://www.medini.org/software/gedit/gedit.html  (with screenshot)

enjoy &&|| complain
-- yotam