I got stopped in Nimes (pronounced Nim) during my back trip to Spain and was surprised how nice city it was with highest level to services for the person without money. However, when sitting down for ten twenty minutes I had already raised few Euros to myself.
Just behind the railway on Rue de Terraube 1 is a place where you can get breakfast, morning coffee, showers, etc from 9 AM.
There where very nice people and extremely friendly service.
Then there is two Social Restaurants where you can eat fantastic meal at 1 EUR only and each evening 7.30 PM red cross van is giving you warm soup, big sandwich, yogurts, sweets, etc in the main boulevard named Avenue Jean Jaures.
In addition, there are long term food and financial help from several organizations but my goal was to continue my trip back to Barcelona.
City Tourist Office and other places can give you the brochure of their free services.
Another City was Aix en Province where you can get free food on weekdays from Service Accuel Orientation (SAO) situated at the city stadium when you walk towards route de Galice. As usual in France, you need to be there before 12 midday but they gave me one big box of salad and second with fish and rise to take with me when I was late.