Metalsmith has 200+ plugins. Some duplicates and a few are in a bad shape, these list won't contain any of them.
- metalsmith-layouts - Wrap layouts around posts
- metalsmith-in-place - Use template tags within posts
- metalsmith-markdown - Markdown with marked
- metalsmith-markdownit - Markdown with markdownit
- metalsmith-code-highlight - Highlight.js Code Highlighting
- metalsmith-youtube - Add youtube videos
- metalsmith-tags - Tag your posts
- metalsmith-disqus - Disqus comments
- metalsmith-autotoc - Generate a table of contents
- metalsmith-multi-language - i18n
- metalsmith-project-images - Locate and add post images
- metalsmith-collections - Group posts
- metalsmith-excerpts - Extract excerpts
- metalsmith-permalinks - Permanent links
- metalsmith-drafts - Mark posts as draft
- metalsmith-author - Add author information
- metalsmith-algolia - Algolia search
- contentful-metalsmith - Contentful
- metalsmith-prismic - Prismic
- metalsmith-assets - Copy assets
- metalsmith-image-resizer - Simple resize
- metalsmith-sharp - Complex image manipulation
- metalsmith-sitemap - Sitemap.xml
- metalsmith-redirect - Set up redirects
- metalsmith-default-values - Default metadata with patterns
- metalsmith-metadata - Load metadata from files
- metalsmith-imagemin - Minify images
- metalsmith-purifycss - Remove unused css
- metalsmith-html-tidy - Tidy up html
- metalsmith-html-minifier - Minify html
- metalsmith-debug-ui - Graphical debug UI
- metalsmith-changed - Only build changed files (requires
clean(false)) - metalsmith-incremental - Only changed + restore cached unchanged