I don't understand what Free Quests means.
But here is a link to all the http://fallout.wikia.com/wiki/Fallout:_New_Vegas_quests.
From
Prima Guide - There are more than 90 "Free Quests":
"These are tasks that never appear in your
Pip-Boy's Quest menu. Clues to some appear in your
Notes menu, and you'll simply stumble across others."
Example: "Dealing with Contreras" is started when you talk to Contreras in the
Supply Shack in the
Concourse, in
Camp McCarran.
If you agree to help, you get a
Note (
in menu) to deliver an invoice to
Issac (
a Gun Runner).
They seem to be just-for-fun tasks since you gain no rep nor Bottle-Caps, but you DO get small XP.
:facepalm: By the way, I did locate where the
Prima Guide has "Free Quests." They are BURIED in the section "Welcome to the Mojove Wasteland." They are not in a list like
Side Quests are.