amin, 
Just finished an initial version of a metasearch engine to locally search and display answers from dumps of StackExchange sites. Calling it MetaStack.
Demo here: https://stack.clew.se
Code and setup instructions here: https://codeberg.org/Clew/MetaStack
Still could use some work, but for an evening's work I'd say this is pretty good. :)
Boosts are welcome, as always.
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