I developed a Windows Phone Seven application to help people with language issues. This application is principally useful for concerned autistic people (like my son) but it can also be used for many handicap.
You can look at the video here.
Please like the video. I need a lot of likes to be able to present it to Steve Ballmer for a Microsoft France Challenge.
Note that you first have to like developer group page http://www.facebook.com/Developpeurs.net. Then go to http://www.facebook.com/video/video.php?v=474796506010&ref=mf and like it