Yes, very useful app, can search multiple Evernote accounts at the same time, the viewer is excellent, shows Evernote note including PDFs very fast etc..
The only issue with Found is it hasn't been updated for a long time and there is a huge memory leak issue. I observed it first on 10.6.8 but same issue is on 1.9.5 (I don't know if OSX versions between are affected). The NotelsFound background process (I assume it does the indexing) runs huge memory usage over period of time, it can be 2 or more Gig of RAM and it keeps doing something.
Terminating it once a day is the only solution to recover the RAM it consumes. It will restart automatically after terminated and memory goes back to about 500MB, still a lot, but I guess it has to do with the enormous amount of notes I have (almost 20,000 notes in Evernote).
There was another app called CloudMagic, it wasn't local, it was 3rd party cloud, but they no longer provide indexing of Evernote.
Found is great tool, in particular if you are concerned about privacy, it indexes files locally. Services such as CloudMagic would access your Evernote files and store indexed data or who knows maybe even a copy of your notes on their servers, which could lead to issues with there is privacy breach. One more provide and server to worry about, as if there wasn't enough.
That said - Found is a great tool and I hope it get its updates.