If this doesn't exist (I can't find anything at least).
Considering the killer community in Webflow of devs, designers etc. it may be useful to release a UI/UX kit of the platform for something like Adobe XD, Sketch, Figma, etc.
I've seen some users release concepts for Webflow features - likely created from scratch. Not only would it empower us to satisfy our creative ADD and procrastinate on our own work to show what we think cool features in Webflow could look like (especially when submitting wishlist etc), but it could potentially give Webflow themselves more of a visual and aid in the development / design time when creating and implementing these features.
Or it could just be really cool to see what people come up with... ¯\_(ツ)_/¯