pdf_oxide

PdfCraft is an open-source PDF reader and editor rewritten from scratch in pure Rust, following the Acrobat workflow with reading, organizing, merging, splitting and securing PDFs, threaded comments, no account and no telemetry across desktop and the browser.

A PDF processing library and command-line tool written in Go, supporting validation, optimization, encryption, signing, document assembly, and content extraction.

tchMaterial-parser is a Python-based downloader with a cross-platform GUI for the National Smart Education Platform of China, letting users batch-parse and download PDF textbooks with automatic naming and bookmarking.

A content-preserving PDF document transformer and C++ library, supporting linearization, encryption, splitting, and merging of PDF files.

ChinaTextbookStudyFree is an open-source project that consolidates official public textbook resources for all educational stages in China, from primary school to university, providing free high-definition watermark-free PDF textbook downloads covering 8 major textbook versions including PEP and BNU, with a total resource volume of approximately 100GB, aiming to break down educational information barriers.

ClearPDF is an open-source Android document toolkit built with Kotlin and Jetpack Compose, covering PDF reading and annotation, form signing, Office viewing, XLSX editing, image editing, and document scanning.