Les Uniformes de l’Armee Francaise contains a series of marvelous images that will work very well as a painting guide.
World War 2 France is a one page board game free for the downloading. It’s about France. In World War 2. Natch.
Richelieu is a card game based on the efforts of Mary of Medici to have the young Louis the XIIIth dismiss the Cardinal of Richelieu.
Board Game geek has downloads of the rules and all the files needed to play.
For a terrific collection of color plates of French military costume from the Gauls to 1806, visit The New York Public Library digital galleries.