Thorium Reader is the EPUB reader of choice for Windows, MacOS and Linux.

This EDRLab application is in constant development and is now the reference for accessing EPUB 3 publications in reflow or fixed layout format, audiobooks and visual narratives, PDF documents and DAISY ebooks; LCP protected or not.

It is localized in a large set of languages, each version offering new locales.

Huge efforts are also made to get Thorium Reader highly accessible for visually impaired and dyslexic people.

This application is free, with no ads and no leaks of private data. This is the perfect tools for heavy readers, library patrons and students.

Being a fan of Markdown and text formats in general, but living and working in a society where other formats are more often used, it's convenient to be able to convert my files to formats others can use.

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…only requires PHP and SQLite, you don't need anything else - no containers, no nothing
…is typo-tolerant (based on the State Set Index Algorithm and Levenshtein)
…supports phrase search using " quotation marks
…supports filtering (and ordering) on any attribute with any SQL-inspired filter statement
…supports filtering (and ordering) on Geo distance
…orders relevance based on a typical TF-IDF Cosine similarity algorithm
…auto-detects languages
…supports stemming
…is very easy to use
…is all-in-all just the easiest way to replace your good old SQL LIKE %...% queries with a way better search experience but without all the hassle of an additional service to manage. SQLite is everywhere and all it needs is your filesystem.