All the below templates are free for commercial and personal use. They're designed for HTML to PDF converters that support CSS Paged Media W3C specifications, such as DocRaptor and Prince. These specifications provide a level of power and flexibility that open-source PDF converters can't match; making headers, footers, accessibility, and other advanced features easy to implement.
Each template is heavily commented to make it easy to customize and uses CSS variables allow for instant color changes. To suggest improvements or request additional templates, open an issue on the GitHub repo. Enjoy!