The Mermaid.js Helper (OMH) plugin for Obsidian enhances the usability of Mermaid.js flowcharts and graphs. It introduces various commands to streamline workflow, such as cleaning up Mermaid code by organizing variable declarations, applying regex patterns to Mermaid styles or classes, and creating files from a list of titles or sections. Additional features include copying global color groups to local graphs and converting lists into link formats. This plugin is ideal for users who frequently work with Mermaid.js diagrams and need efficient tools for managing and customizing their flowcharts and graphs within Obsidian.

The Sankey plugin enables users to create Sankey diagrams directly within Obsidian using simple YAML-based syntax. These diagrams visually represent flows between different entities, making it useful for analyzing processes, energy transfers, financial transactions, or hierarchical structures. Users can define links between nodes, specify values for each connection, and customize node colors for better visualization. If node definitions are incomplete, the plugin automatically infers missing nodes based on link data.

The Flowcharts plugin enables users to create and render flowcharts directly within Obsidian notes using `flowchart.js` syntax. It provides an intuitive way to visualize processes, decision trees, and workflows through a dedicated code block format. Users can customize flowchart elements, including line width, font size, colors, and decision path labels, directly from the plugin settings.