Dr. Geo (http://www.drgeo.eu) is a neat open source application showing
the power of Pharo Smalltalk.
It is targeted to teachers, parents and kids for all over the world.
It is distributed as a portable desktop application and also a XO
application for the OLPC kid laptop.
As for now it is translated in English, French, German and Spanish.
I would love to see more translation from the European house (latin
alphabet based, there is still investigation to be done for non latin
Italian, Portuguese, Swedish, Finland, Dutch, Norwich, Danish... will be
Translating DrGeo is less than one hour of work.