[everforward]

That is available in regular ComfyUI, though theirs does look very easy to use.

The neatest prompting tool idea I saw was one that used an LLM to do prompt refinement for the image, though the implementation I found was more antagonistic than helpful. It garbled my prompts into near-synonyms, giving me a basically equally crappy prompt but for a very different image.

The varied prompts are very neat too, where you give it a template string and a list of options to interpolate and it generates an image for each combo or random combos or etc. Very nice when you want to see the same image with different moods, lighting, backgrounds, etc.