During the APEC Conference last February 13-16, 2014 in Tokyo, I attended a lecture of Prof. Ivan Vysotsky of Moscow Institute of Open Education (Russia). One interesting website he presented was the International Open Bank of Mathematical Problems.
Basically, country members of the website can upload mathematics questions which can then be used by other member countries or translated to their own language. The website is basically new and during his lecture, Prof. Vysotsky was inviting for collaborators. You can visit the website and see the contact page if you are interested.
Currently, the website is available in English, Russian, French, German and Chinese.