Flexible, minimalistic, multi-platform static site generator built on top of node.js.
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Templating engine comes with Jade plugin and many third-party plugins.
Pro Very flexible
Wintersmith only has a predefined directory structure, everything else can built any way you want.
Pro Built on node.js
Node.js is a software platform for scalable server-side and networking applications.
Con Thin and disorganized documentation
The documentation for Wintersmith is lacking examples and clear explanations. It's also quite disorganized, making it difficult to find what you're looking for.