FastAPI[2] for fast backend API creation. It has auto-generated, interactive docs which is nice and negates having to use postman to test endpoints. You can auto generate your client code for calling your API as well as client side types based on your API.
TailwindUI[3] for insanely fast front-end development work that looks good.
Render[4] makes it incredibly easy to do automated deployment and hosting with SSL for your web apps. It's an huge productivity boost over using AWS for indie development.
Disclaimer: I make a vim learning tool[1].
[1] https://vim.so