Below are some of the French property web sites that I found during my own search for a house in France. There are some that cover the whole of France although the bais is towards Normandy as that is where we were looking for a house. There are also some links to sites that could be useful to you after you've bought your house in France.
Acknowledgements: images used on the left in the text area are mainly from morguefile.com, my thanks to biberta, missyredboots, rosevita, doctor_bob, cohdra, mconners, kairily, clarita, scott. m. liddel, and anyone else from morguefile whose image appears here. All the images in the right hand column on each page have been taken by me during my various travels in France and are copyright of buyahouseinfrance.info.