GitHub Flavored Markdown Plus is a Chrome add-on developed by dictav. It is a free program that enhances the reading and writing of Markdown files as well as the ability to read and write comments on Issues and Pull Requests in GitHub.

With GitHub Flavored Markdown Plus, users can not only edit Markdown files but also create flowcharts and display mathematical equations in a visually appealing manner. The program extends the functionality of GitHub's code blocks by supporting the mermaid and katex extensions.

The mermaid extension allows users to create flowcharts, gantt charts, and ER diagrams using the JavaScript library Mermaid. Users can easily draw diagrams by using the mermaid syntax within code blocks.

The katex extension enables users to write mathematical equations using the JavaScript library KaTeX. By utilizing the katex syntax within code blocks, users can display complex mathematical formulas in a clear and concise manner.

GitHub Flavored Markdown Plus is a valuable tool for developers and users who frequently work with Markdown files and GitHub. It enhances the editing experience and allows for the creation of visually appealing diagrams and mathematical equations.