Marginalia - An Awesome Independent Search Engine!

Unobtanium - Search the web a little simpler

Stract - Cool idea with lots of optics like ' Remove the top 10,000 most popular websites from search results.'

Lieu - A search engine aimed at searching webrings. Useful mix of new and old discovery methods.

Search My Site -Only crawls user-submitted sites instead of trying to discover new sites.

Wiby - A search engine for websites using older technology, great for use on vintage computers.

YaCy - A decentralized search engine;

PeARS - A search engine that can be run in the browser, without needing a server.

Mojeek - One of the biggest of the independent search engines; they’ve been around forever.