DuckDuckGo/Brave + Kagi.

Others, more specific uses:

• https://www.ecosia.org/ - search with praxis, kind of mixed results but non tracking and they do good things
• https://www.perplexity.ai/ - longform answers by ai with citations plus search
• https://search.marginalia.nu/ - anti corpo search
• https://www.wolframalpha.com/ - STEM
• https://www.phind.com/ - programming
• https://knaben.eu/ - torrents
• https://annas-archive.org/ - books