Niqqudizator
For some of your Niqqud needs!
Link to the app: https://ish.works/nqd
This is a small single-page web application for manually adding Niqqud to Hebrew text, with a focus on mobile devices, where currently-existing solutions (back in the day) were fiddly and inconvenient.
Developed in TypeScript using Preact with Sass for stylesheets.