marp.app
Marp, the Markdown Presentation Ecosystem, is a toolset for creating slide decks from Markdown documents. Its format is based on CommonMark, with a ruler for splitting pages. It supports directives, extended syntax, and built-in themes, with CSS theming. Markdown can be converted into presentation-ready HTML, PDF, and PowerPoint files. The ecosystem includes Marp for VS Code and Marp CLI, and is built on the Marpit framework.