Linux Softwares to PDF annotation

PDF Studio is a powerful, all-in-one PDF editor for Windows, macOS, and Linux. It provides comprehensive tools for viewing, creating, editing, securing, and reviewing PDF documents, serving professionals and individuals alike with robust features for managing their digital documents efficiently.

Polar is a powerful desktop application designed to serve as an integrated reading environment. It allows users to actively read, annotate PDFs and web pages, create flashcards for spaced repetition learning, organize their digital library, and track their reading and learning progress. It's built for focused and deep engagement with digital content.

colwiz is a comprehensive research management software designed for academics and researchers. It provides tools for organizing research papers, generating bibliographies, collaborating with peers, and managing research projects.

SCIENTILLA is a free, open-source scientific register designed for researchers and organizations to manage bibliographies, references, and knowledge efficiently. It facilitates collaboration and streamlines the research workflow.

PDFedit is a free, open-source PDF editor targeted primarily at Unix-like operating systems users, including those running Windows with Cygwin. It offers core PDF manipulation functionalities like editing, merging, splitting, and basic form creation, though it lacks support for encrypted files or advanced text editing.

Stylus Labs Write is a unique word processor designed specifically for handwritten input on tablets and other stylus-enabled devices. It offers a fluid writing experience with tools tailored for digital ink, including robust erasing, flexible formatting, and organizational features.

Master PDF Editor is a comprehensive PDF editing suite for Windows, macOS, and Linux. It empowers users to create, edit, view, annotate, and sign PDF documents with a robust set of tools.

qpdfview is a lightweight, tabbed document viewer based on Qt. It supports PDF, DjVu, PostScript, and other document formats, offering features like annotation, form filling, and a clean, customizable interface for efficient document management.

Xournal is a classic open-source application designed for digital note-taking, sketching, and PDF annotation, primarily using a stylus. It provides a simple yet effective environment for handwritten notes and document markup, offering support for various input methods including Wacom tablets.

JabRef is a free and open-source reference management software, primarily designed for LaTeX users, utilizing BibTeX and BibLaTeX formats for efficient organization and citation of academic references and documents.

Okular is a versatile document viewer from the KDE community, supporting a wide array of file formats including PDF, EPUB, DjVu, and TIFF. It offers intuitive navigation, robust annotation tools, and features like text selection and saving, making it a powerful tool for handling diverse document types.

Zotero is a free and open-source reference management software that helps users collect, organize, cite, and share their research sources. It integrates seamlessly with web browsers and word processors to streamline the research and writing process.

Mendeley is a freemium reference manager and academic social network designed for researchers. It helps organize, manage, and share research papers, generate citations, and collaborate on projects.

Foxit Reader is a robust and feature-rich PDF reader and editor that provides users with a comprehensive set of tools for viewing, annotating, signing, and creating PDF documents. Known for its blend of performance and functionality, it caters to both casual users and professionals handling complex PDF workflows.