Hello HN,
In my spare time I work on an experimental search engine named Ichido. Search is fascinating, there are so many features you can add to a search engine, but I find that the existing search engines are a bit limited in the features they have to offer. So I decided to work on my own search engine to test out different features, searching algorithms, and front ends in order to improve my (and hopefully others) searching experience.
Ichido includes a tagging system that provides more info on search results. For example, if a site links to Google services or uses Cloudflare, a tag is shown with the search result that let's the user know about that site's use of those services. Ichido also includes links to RSS feeds in search results, making it much easier to find RSS feeds.
This search engine is free to use, but if you like the service and want to support continued development please consider making a donation (Ichido currently supports donations through Libera Pay).
Also one really useful tag would be "Affiliate links" if there is a way to identify a page contains affiliate links like amazon affiliate, etc. Those pages are always almost crap.
Also a tag for "Modal popups", those are too often just marketing related websites and definitely want to skip it if I know prior to visiting.