Fake Data
Mockaroo
Fake Filler
Magical
Pradoy
Fillr.app
Reggy
DataConstruct
Manuskript
Scrivener
bibisco
yWriter
oStorybook
Novelize
BlankPage
Novlr
Fake Data
ManuskriptManuskript might be a bit more popular than Fake Data. We know about 1 link to it since March 2021 and only 1 link to Fake Data. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Fake Data - browser extension to quickly fill out forms with random data during development. Source: over 4 years ago
Looks like you want something that integrates well with your workflow. The closest to your description seems to be Manuskript although I haven't used it. But your requirement of "keeping notes and frameworks and linking back and forth" should be possible by stitching together existing Linux tools using a syntax like markdown or asciidoc so that you can use any text editor to write your story and use external tools... Source: almost 5 years ago
Mockaroo - A realistic data generator to test your app
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Fake Filler - The quickest way to fill all inputs on a page with fake data.
bibisco - bibisco is a novel writing software.
Magical - Make tasks disappear.
yWriter - Free writing software designed by the author of the Hal Spacejock and Hal Junior series. yWriter6 helps you write a book by organising chapters, scenes, characters and locations in an easy-to-use interface.