rga: ripgrep, but also search in PDFs, E-Books, Office documents, etc.
A fully featured full text search engine written in PHP
Catalog and Search files from permanent or removable drives
Command-line toolset for extracting text from files
Load filenames to a local database for an easy search
Common Resource Grep
simple searching tool for big fileservers
Tagging system for local files
Portable source code librarian
extract unique file sets from sets with duplicates
Trovi is a text search tool for PDF files