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 * [ky](https://github.com/sindresorhus/ky) - Tiny and elegant HTTP client based on the browser Fetch API.
 * [Fcal](https://github.com/5anthosh/fcal) -  Math expression evaluator
 * [emoji-button](https://github.com/joeattardi/emoji-button) - Vanilla JavaScript emoji picker component
+* [Idyll](https://github.com/idyll-lang/idyll) - Create explorable explanations and interactive storytelling essays. Can be [embedded in HTML](https://github.com/idyll-lang/idyll-embed).
 
 ## Podcasts
 * [JavaScript Air](https://javascriptair.com/) - The live video broadcast podcast all about JavaScript and the Web platform.