Metalsmith - An extremely simple, pluggable static site generator.
DuckDuckGo - The Internet privacy company that empowers you to seamlessly take control of your personal information online, without any tradeoffs.
Nikola - Nikola is s static site generator tool written in Python.
Google - Google Search, also referred to as Google Web Search or simply Google, is a web search engine developed by Google. It is the most used search engine on the World Wide Web
Assemble - The static site generator for Node.js, Grunt.js and Yeoman
Searx - Open source metasearch engine