Free parking in Paris (13. arrondissement)!

You'll most likely not believe me, but you can actually park for free in Paris, at least in the 13. arrondissement!

I lived in Fondation Deutsch for a year, and a narrow, "blind" street next to our place has free parking, see this link to Google Maps for the specific spot:

Avenue David Weill

The downside, of course, is that it is a very small street, and there can be approximately 15 cars there. The interesting part, though, is that in weekends, the local people tend to go out of Paris, and then you can get lucky to get one of those spaces. I've been back and forth from Denmark to Paris for that year, and every time I succeed  to get our car parked - of course, some times there were no vacant spaces, but after 10 PM, there's usually a few vacant!