massCode
A free and open source code snippets manager for developers
... to syntax highlighting, tables, list and other formatting. Also massCode supports Mermaid. massCode allows you to make a presentation out of a sequence of snippets. It's great for classroom use, team meetings, conferences or simply reviewing notes on your own. You can not only collect snippets but also see the rendering result for HTML and CSS in real-time. Test the idea or just view the result.