Sameko Dev C++
Beautiful, fast anime-style C++ IDE with zero setup for CP
...Think of it as a modern Dev-C++ alternative that works out of the box: the Windows build comes with GCC 16, clangd and GDB, so there is no compiler to set up. It checks your output against expected answers (AC/WA/TLE), fetches test cases with Competitive Companion, runs tests in parallel, and has a GDB debugger with STL-aware variables. Pick from eleven built-in themes or make your own with image or video backgrounds. Interface in English, Vietnamese and Simplified Chinese. Official site and downloads: https://sameko.dev/