I don&#39;t expect these are used by many, but adding what I use, FWIW:<br><br>vim (command line for *NIX systems mainly) handles // TODO and // FIXME, and they are highlighted.<br>It does not highlight doxygen (maybe needs a plugin, but not by default).
<br><br>Quanta (GUI IDE for KDE) does NOT highlight // TODO nor // FIXME, but does detect doxygen by default and highlights @todo and other doxygen keywords. @todo is only highlighted if it is in a doxygon block.<br>