Lucas0623z / NoteLite

Open-source OMR and guided music practice: turn sheet music PDFs/images into MusicXML/MIDI, refine scores, and practice with MIDI or microphone feedback.

torakiki / pdfsam

PDFsam, a desktop application to split, merge, mix, rotate PDF files and extract pages

LibrePDF / OpenPDF

OpenPDF is an open-source Java library for creating, editing, rendering, and encrypting PDF documents, as well as generating PDFs from HTML. It is licensed under the LGPL and MPL.

wgzhao / Addax

Actively maintained successor to Alibaba DataX — a fast, versatile, open-source ETL tool for 30+ RDBMS and NoSQL data sources.

hardcore-sushi / DroidFS

Encrypted overlay filesystems implementation for Android. Also available on Tangled.

ExtractPDF4J / ExtractPDF4J

Java PDF table extraction & OCR library. Extract structured tables from text-based and scanned PDFs using stream, lattice (OpenCV-style grid detection), and hybrid parsing.