Searx and Gigablast are FOSS. I find gigablast is good when you want to find location based stuff, but searx works well too. If you want location based (your location) things or to buy something at a price, duckduckgo and google are still the best. Searx will sometimes pull weird results, even though the results are different from instance to instance (Searx got many instances). It is worth mentioning that searx and gigablast got no ads, but duckduckgo ads aren’t very invasive as other search engines.

I use searx for most things, but I do have to switch to google or duckduckgo for some things, something that didn’t happen with duckduckgo.