Bonjourdefrance.com: Vocabulary games to learn French vocabulary and common French expressions. Play at riddles and fill in the blanks to get a common French expression.
Globegate.utm.edu: French riddle game. Sharpens your understand of French, your capacity for deduction, and your concentration. Read the description of 4 individuals and, based on these basic descriptions answer try to figure out the answers to 30 questions. "Exercise de TennesseeBob - Une comparaison de quatre individus".
Internet Polyglot.com : Vocabulary lessons. There are several options: Tutorial Slide Show (with photos and audio files); Guessing Game (flashcards); Typing Game (spelling); Matching Game (French word and its translation). Game Mix (all the above games). Those wishing to register keep their results and create their own lessons.