Bell:
Bell is a modern rendergraph driven vulkan renderer. It supports both a UE4 style metalness/Roughess as well as a Specular/Gloss PBR pipeline.
It currently has forward and deferred image based lighting paths, as well as dynamic lighting provided by a clustered lighting path.
The renderer is trivially extendable by implementing a subclass of RenderEngine/Technique, which takes care of requesting per frame resources and implicitly specifying dependancies between tasks.
This repo also contains a standalone, node based editor which is rendered in engine. pictured below is a forward IBL render graph in this editor.
And the frame it produces in the scene preview window.