One high-quality non-commercial web site that this does not seem to index is Wikipedia.

Great search engine, don’t forget to try the ‘random’ link[0] . It’s how I’ve been using it to discover the interesting and less-visited corners of the internet.

Also, apparently the developer is going to be working on this project full-time for the next two years[1]. Hoping for the best and interested to see where he takes the project.

[0] https://search.marginalia.nu/explore/random

[1] https://www.marginalia.nu/log/83_full_time/