Quill.js + typescript
Quill is a free, open source WYSIWYG modern rich text editor built for compatibility and extensibility.
Fabric.js is a framework that makes it easy to work with HTML5 canvas element. It is an interactive object model on top of canvas element. It is also an SVG-to-canvas parser.
Create and ship beautiful animations to any platform.
Audio library for the modern web. howler.js makes working with audio in JavaScript easy and reliable across all platforms.
reveal.js is an open-source HTML presentation framework. It's a tool that enables anyone with a web browser to create fully-featured and beautiful presentations for free.
A simple HTML5, YouTube, and Vimeo player.
A Multi-platform typescript voice-recorder library for browser.