AnyJudge is a problem solving platform. We have no own created problem. We gather problems from different Online Judge & allow you to submit them. AnyJudge supports many online judges. Some of them are:

DimikOJ LightOJ Toph URI/beecrowd
51Nod ACdream Aizu AtCoder
CodeChef CodeForces CSU EIJudge
EOlymp FZU Gym HackerRank
HDU HihoCoder HIT HRBUST
HUST HYSBZ Kattis LibreOJ
NBUT OpenJudge POJ SCU
SGU SPOJ TopCoder UESTC
UniversalOJ URAL UVA UVALive
Z_trening ZOJ 计蒜客