fteqccgui (which is windows only) now includes tooltips to show variable types and comments in a tooltip.
for example
void(float somearg) foo; // some comment
will show:
> void(float somearg) foo
> some comment
as a tooltip.
should work nicely enough with vanilla defs.qc, including multi line bits.
Note that you'll need to click the compile button before they appear, however.
Hopefully this feature will save the handful of people who still write qc code a little bit of time looking up the argument lists etc.
As always, you can get svn builds from here: http://triptohell.info/moodles/fteqcc/
Or Random Direct Link
As always, let me know of issues so that I can to add them to my imaginary todo list.