Internet search is such a fundamental function that in an effort to make it easier to get out of the habit of just using Google all the time I've moved the Searx metasearch app to being part of the base system of Freedombone so that it's installed by default. When you navigate to the web interface there is now a search bar there, or you can use http://freedombone/search or the equivalent onion address for the web interface.
Outgoing search queries are routed through Tor so that you have a reasonable level of privacy. Metasearch isn't a complete solution to the problem of searching in a decentralized architecture, since it merely sends out your query to other search engines. You could call this a less centralized approach which does a better job of avoiding privacy problems.