The Godot Addon pack has just got a new addon, which provides some extra tools to help debug the projects.
There is the
OverlayDebugInfo script that provides means to quickly add text into the screen without the need to create UI controls all over the place. The resulting panel will expand/shrink according to its contents.
DebugLine3D, which helps with the task of drawing lines in 3D.
The addon pack tutorial has been updated to explain things about this new addon.
The addon pack itself can be found on my GitHub Repository.