Metalsmith : An extremely simple, pluggable static site generator.
OWASP : The Open Web Application Security Project (OWASP) is a worldwide not-for-profit charitable organization focused on improving the security of software.
Untools : Collection of thinking tools and frameworks to help you solve problems, make decisions and understand systems.
ApiGen : ApiGen is the tool for creating professional API documentation from PHP source code, similar to discontinued phpDocumentor/phpDoc.
JSON Schema : JSON Schema is a vocabulary that allows you to annotate and validate JSON documents.