Pinboard is described as 'Bookmarking website intended for people who want to reliably keep track of large numbers of links. Its goals are to be useful, fight bloat, keep things fast, and stay small. Social bookmarking for introverts. m.pinboard' and is a very popular social bookmarking tool in the photos & graphics category. There are more than 100 alternatives to Pinboard, not only websites but also apps for a variety of platforms, including Google Chrome, iPhone, Mozilla Firefox and iPad apps. The best Pinboard alternative is Raindrop.io, which is free. Other great sites and apps similar to Pinboard are wallabag, Karakeep, Obsidian Web Clipper and ArchiveBox.
A tool for performing web searches with iterative filters for later presentation. It's the opposite of a bookmark service where sites are whitelisted (saved) and instead does blacklisting from a dynamic external input source (search engines).