The Arduberry has one wish: to bring together the Arduino and the Raspberry Pi.
Designed by Dexter Industries, the Aruberry is a shield that plugs into a Pi so that Arduino sensors and shields can be easily connected. No physical adjustments are requirement for most shields: you can just plug them in and program them via your Raspberry Pi using Python, C or Scratch. With so many sensors and shields already available for the Arduino, it makes sense to take advantage of them for your next Pi project.
You can get lots of inspiration online, too. The folks at Dexter Industries have already uploaded tutorials for several projects, including an NFC card reader, a Lionel train controller, and an ultrasonic ranger.
You can buy the Arduberry onilne for just $29.99.