About Search Commons
Search Commons is an open source project that maintains a directory of websites you can restrict your search to.
A search engine you pick on the home page includes only the domains specified in that engine's list of websites. This list is available on the GitHub page of the project. Search engines are powered by Google Custom Search.
You can create and modify the engines available on Search Commons. You can also use existing lists to create a private search engine.
Google injects ads in search results as part of its free Custom Search service. Search Commons does not control the content of the ads, does not earn a commission from the ads, and does not add new advertisements.
Anton Tarasenko, creator and maintainer of Search Commons: