ChatMD is a chatbot, which you can configure yourself in Markdown. Create a Markdown file and put it online: on CodiMD, or on a forge. Use ChatMD syntax to define your chatbot.
You may also be interested in ...
Fast
The adaptive interface system for modern web experiences. Interfaces built with FAST adapt to your design system and can be used with any modern UI Framework by leveraging industry standard Web Components.
:nth Tester
Online and visually :nth css tester made by CSSTricks.
Old CSS, new CSS
Here’s a history of CSS and web design from 90's to 2020 written by Eevee.