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1hydro-dev / HydroHydro - Next generation high performance online-judge platform - A new generation of efficient and powerful informatics online assessment system (a.k.a. vj5)TypeScriptAGPL-3.0 · Share derivative sourceInsufficient rank history7,187495——2026-11-02

2judge0 / judge0Robust, fast, scalable, and sandboxed open-source online code execution system for humans and AI.HTMLGPL-3.0 · Share derivative sourceInsufficient rank history4,503940——2026-10-26

3zhblue / hustojPopular Simple Open Source Online Judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training, with easy installation. Simple and practical open source OJ systemJavaScriptGPL-2.0 · Share derivative sourceInsufficient rank history3,820831——2026-11-02

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