The Louvre app for apple products is pretty dandy. You can take tours of the museum,learn a bit of history about the artwork, building, current display of the galleries, and get information to get around it.The only down side for the people who aren’t francophone speakers, is that videos are in French ;but rest of the application remains in English .

Update: You can change French language in video section to :English,German,Japanese.I would add :Spanish,Mandarin.