Quill is a free, open source WYSIWYG editor built for the modern web. With its modular architecture and expressive API, it is completely customizable to fit any need.

BRiCSS is a low-level CSS library generator that is simple and customizable. It allows users to create a tailored CSS file library based on a JSON file. BRiCSS is designed to be a simple CSS abstraction using abbreviations of CSS class names and attributes. It is intended to be integrated into a design system.

Fuse.js is an open source project and a popular JavaScript fuzzy-search library written and maintained by Kiro Risk.