Ask HN: Is there a tool to “diff” search engines?
Learn X by Doing Y – A project-based learning search engine
Ecosia – A search engine that plants trees
Startpage.com: Privacy-oriented search engine
Google looks at pulling all or part of its search engine from Australia
Show HN: Simplest and cleanest RSS Search Engine in the world
Okeano – A search engine that cleans the ocean and respects your privacy