This is my personal project that I integrated into my work on some R&D project.
It's an in-game developer's panel based on Unity's ImGui, which allows for the easy addition or removal of custom GUI elements at runtime. It includes the most common widgets that are missing in Unity's default non editor ImGui, such as proper numeric fields (with numeric touch keyboard), enum fields, and even a color picker.
It can be used for adding some developer cheats, quick game design tweaks, runtime debug info etc.
Full description and the tool itself are available on github as a Unity Package.