I'm currently working on a PDF search engine that will index and then search through several thousand pdfs. As a tabletop role-player and former researcher, I've always wanted a simple tool to do this, and I hope I won't be the only one to benefit from it. This is my first project of this scale and I hope to be able to show it here soon.
On the technical side, it's a desktop application coded entirely in java with a javaFX interface. No AI or online data uploads, just the Lucene search engine and PDFium for PDF rendering.
Here is a very short demo : https://youtu.be/CGo9JRUByGA