Nice little A.I tool that writes the next few sentences in your story.
Maybe use this tool with <a href="https://randomwordgenerator.com/">this random word generator</a> to create a new word.
A collection of various text-to-image tools, often Google Colab files for creating unusual images.
Another few excellent tools here too (including a tool up upsize small images)
Lots of example text-based A.I apps that you can use to help your ideas along. If you like what they do, you could maybe integrate that feature via an API into your app.
A github repository of LOTS of Google Colab notebooks for doing text-based A.I.
Lovely free, web-based tele-prompter, or autocue. Really helpful if you're recording a voice track.
It even has mirroring so you can hold a sheet of glass, and reflect onto it, looking straight at the camera. Nice.
Create your own URL - I made myworldofnonsense, and you have a "live" editable grid you can share with collaborators.
Textable is an Add-on to a really interesting visual tool call Orange3. With them together you can do textual or data analysis and shaping, and filtering, WITHOUT coding.
Really interesting text visualisation tool
Disaster of an interface, but a nice tool that searches YouTube transcripts for what you want.
Really interesting exploratory interface, that slices archive texts together.
Fab collection of text-based visualisations
Wonderful collection of images made from text
Choosing a text editor for coding is a very personal choice. Some have "too many" features, others are too simple. You may need to try more than a few to find one that you like working in, but it's not until you start on an actual project, that you'll be really able to tell.