[fsflover]

Here you go: distributed, peer-to-peer, FLOSS search engine: https://yacy.net

[viraptor]

I love the idea itself, but the project is dying. Almost no maintenance, the P2P part is spammed / unusable, CloudFlare bot checks wreck your IP reputation, the deployment/setup is... idiosyncratic. I wish it was still practical to use YaCy.