Pheeds.com

Wolfram Alpha is a really interesting research search engine.
https://www.wolframalpha.com

Here's a tour:
https://www.wolframalpha.com/tour/

It also offers a "vs" feature where you can compare two websites and get some interesting facts. Here's Quora.com vs Answers.com
https://www.wolframalpha.com/input/?i=qu...nswers.com

DuckDuckGo - Has some good features and no tracking of its users.

Boardreader - A forum/discussion search engine. It seems to get most of its results from Reddit.

StartPage - Another SE for those worried about privacy and it has a proxy service.

This is a search engine that helps you find journalists and influencers. It has a paid version but the free version has some decent benefits. Good be very useful in the right circumstances.

https://anewstip.com/search/articles/

This tool searches subreddits and extracts keyword phrases along with their estimated search volume (from Google I'm guessing). Helpful for coming up with ideas for content, posts and tweets.

https://www.highervisibility.com/free-se...eyworddit/