Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Observable - Interactive code examples/posts
Splash - Anyone can create a Splash event, whether you're a company hosting a single event or an individual hosting a personal event like a birthday or wedding. Get Started for Free. Text goes here. X. Full Event Program.
nbviewer.org - Rackspace server host Jupyter Notebooks from your github repo
Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.
Jupyter - Project Jupyter exists to develop open-source software, open-standards, and services for interactive computing across dozens of programming languages. Ready to get started? Try it in your browser Install the Notebook.