Apps 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.

PandaDoc is an all-in-one document automation software that simplifies the creation, sending, tracking, and e-signing of sales documents like proposals, quotes, and contracts. It streamlines workflows and enhances collaboration for sales teams and businesses.

PDF-Tools by Tracker Software is a powerful, wizard-driven Windows application designed for batch processing and manipulating PDF files. It offers a comprehensive suite of tools for creating, editing, merging, splitting, converting, securing, and optimizing PDF documents, perfect for both individual and business users needing efficent document workflows.

Document Viewer is a highly customizable and lightweight document viewer designed for Android devices. It supports a wide range of formats including PDF, DjVu, XPS, CBZ, CBR, and ePub, offering features like highlighting, annotation, and optimal performance.

BibSonomy is a powerful social bookmarking and publication-sharing platform, designed for researchers and knowledge workers. It allows users to collect, organize, and share literature, documents, and web resources using collaborative tagging and bibliography management features.

OmniPage is a leading optical character recognition (OCR) software designed for accurate and flexible conversion of scanned documents and images into editable digital formats.

RepliGo Reader is a powerful PDF viewing and annotation tool designed for mobile devices. It offers smooth document rendering, a comprehensive set of annotation tools, robust form-filling capabilities, and features for managing and organizing your PDF files.

Documents by Readdle is a powerful file manager, media player, and document viewer for iPhone and iPad. It allows users to organize files, download content, view various document types, listen to music, watch videos, and annotate PDFs all within a single application.

ezPDF Reader is a highly-rated multimedia PDF viewer and annotator for mobile devices. It supports interactive forms, freehand drawing, text highlighting, and offers features like Text-to-Speech and document synchronization, making it a versatile tool for users who work with PDFs on the go.

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.

CloudScan is a user-friendly scanning software designed for efficiently digitizing documents, photos, and images into multipage PDF files. It offers core functionalities like scanning, PDF management (split, merge, edit), and built-in OCR capabilities, making it a comprehensive solution for basic document handling on a single computer.

Xodo is a comprehensive, cross-platform PDF solution offering a wide array of tools for viewing, annotating, editing, signing, and creating PDF documents. With robust collaboration features and seamless cloud integration, it caters to both individual and professional use.

PDFescape is a versatile online PDF editor and form filler.

ThinkFree Office is a comprehensive office suite written in Java, providing a robust and cross-platform solution for document creation, editing, and collaboration on Windows, Linux, macOS, and Android.

Benubird PDF was a document organizer designed to help users manage their PDF collections efficiently. It offered features like tagging, metadata management, and integration with office suites to streamline document workflow and search.

Foxit PDF Creator is a comprehensive PDF creation and manipulation tool. It allows users to create high-quality PDF files from virtually any file format, print to PDF, edit existing PDFs, and perform advanced functions like OCR and batch conversion. It's designed for users needing a robust solution for their PDF workflow.

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.

Foxit Advanced PDF Editor was a robust desktop application designed for comprehensive PDF manipulation. It allowed users to perform extensive editing directly within PDF documents, including text, images, and objects, offering a level of control similar to a word processor.

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.

Signority is a secure cloud-based platform for electronic signatures, offering comprehensive tools for managing document workflows, sending documents in bulk, and seamless integrations with popular services.

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.

ReadCube is a powerful desktop and web-based reference management and PDF annotation tool designed for researchers and students.

Adobe Digital Editions is a user-friendly ebook reader and library management tool, offering support for EPUB and PDF formats. It facilitates reading digital books on various devices and includes features for organizing your collection.

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.

PDF-XChange Editor is a powerful, free PDF editor and viewer for Windows. It offers a wide range of tools for creating, editing, annotating, and managing PDF documents, including OCR, form creation, and advanced security features. Despite its extensive capabilities, it remains lightweight and efficient.

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.

Skim is a free and open-source PDF reader and note-taker for macOS. Tailored for scientific use, it offers advanced annotation tools, robust export options, and tight integration with LaTeX, making it an ideal companion for academic research and professional document management.

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.