I spent a while dawdling in the imaginary corridors of The Internet Archive and found yet another free French audiobooks website.
The lay-out of Audiocite is horrific, but the content is the opposite.
And just for the heck of it, I've embedded a player of the reading of Hugo's The Last Day of A Condemned Man. (Click on the title of this blogpost to get to it).
Infos du livre audio - Audiocite.net