SteveTheKiller / KillerPDF

Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.

unidoc / unipdf

Golang PDF library for creating and processing PDF files (pure go)

fschutt / printpdf

Rust / WASM library for reading, writing and rendering PDF

dengxibo / sumatrapdf-plus

SumatraPDF fork: Chinese EPUB/MOBI, smart PDF dark mode, OCR, TTS, offline dictionary.

richardr1126 / openreader

An open-source read-along document reader server with high-quality TTS options, synchronized highlighting, and audiobook export for EPUB, PDF, DOCX, TXT, and MD.

khoj-ai / openpaper

Open Paper is a workbench for managing your research library. Read, annotate, and understand your papers all in one place. Use an AI assistant to conduct your literature review.

gmi-software / react-native-better-pdf

Native, virtualized PDF viewer for React Native, built on Nitro Views

Dai0-2 / paperflow

Browser-native research workspace for Chrome. Read, annotate, ask with page context, remember, and organize papers.

TortoTech / torto

Next Generation Ebook Reader