Free · in the browser

Web presentations with code that runs

Slides with text, pictures and buttons that lead to any other slide. A code block gets a Run button: viewers run SQL (PostgreSQL), MongoDB, Redis, ClickHouse, Python and Bash right on the slide, each in a sandbox of their own.

It is free.

A slide with an SQL query; under it the window of the result with the rows the query returned.
A viewer pressed Run on the slide: the query ran in their own copy of the database.