Hantei6 GUI editor for Melty Blood.
Building is extremely simple, and it works with both MSVC and Mingw-w64. Clone the git, init the submodules and run cmake. Assuming you're using ninja:
git clone --recursive https://github.com/meifuku/HA6-gui.git
cd HA6-gui
mkdir build
cmake -S. -Bbuild -GNinja
cmake --build build
build\ha6gui.exe
And that's it! This program only for windows.