Progzine
What if we wrote a bot to draw a zine on writing bots that draw zines? Learn how to craft a no-code script to randomly generate zine titles, stories, and art—then run it immediately in your browser.
– andytuba (they or he)
tracery.io offers an "online editor" with various kinds of UI for writing up a grammar, and a live preview.
I prefer writing my grammars in VSCode and rendering them using my webapp emptyjug.xxx/tracery/. I also built a bunch of bells and whistles: modifiers to extend Tracery with data loaders, filters, transformers; a cute webapp to display them; permalinks to specific variations...