https://jivesearch.com/ https://jivesearch.com/. I run it and made an update this week that greatly improved our search results. 100% open source, has all the !

https://jivesearch.com/ https://jivesearch.com/. I run it and made an update this week that greatly improved our search results. 100% open source, has all the !bangs and tons of instant answers.