A selection of links

Tourism (tourisme):

France:
http://www.franceguide.com (in several languages)
http://dg.travelnow.com (in english)
Paris:
Office de tourisme de Paris: http://www.parisbienvenue.com/
Office régional du tourisme: http://www.paris-access.com

Weather forecast (prévisions météo):

Hotels and restaurants (hôtels et restaurants):

Transportation (transports):

Airports (Paris - aéroports):
In French: http://www.adp.fr
In English: http://www.adp.fr
Subway and buses in Paris (métro, RER et bus dans Paris):
In French: http://www.ratp.fr
In English: http://www.ratp.fr
Trains: http://www.sncf.com (in French, click on a flag for other languages).
Road traffic (in French - Trafic routier)
http://www.bison-fute.equipement.gouv.fr/
Road traffic and itineraries (in French - trafic routier et calcul d'itinéraires):
http://www.infotrafic.com/accueil.php
Maps, itineraries, hotels, restaurants, weather forecast and more (in several languages - cartes, itinéraires, hôtels, restaurants, prévisions météo et plus):
http://www.viamichelin.com/