I started searching for various OI problemsets so I could make myself I couple of contests so far I've only found: IOI, CEOI, Balkan/Baltic OI, Open JOI, POI, COI and USACO.
But the sad thing is that I've already seen most of the problems from the previous contests like IOI or COI.
Do you have any other contests to suggest?
P.S. Anything with an English statement and testdata would do :D