dear imgui - https://github.com/ocornut/imgui

Dear ImGui is a bloat-free graphical user interface library for C++.

License

Dear ImGui is licensed under the MIT License, see LICENSE for more information.

Dear ImGui Software Renderer is dual-licensed to the public domain and under the following license: you are granted a perpetual, irrevocable license to copy, modify, publish, and distribute this file as you see fit.