Apps similar to Skim include SumatraPDF, which is free and open source. Other options are Okular, Foxit PDF Reader, Xournal++ and PDF-XChange Editor. PDF Readers like Skim are a crowded field, with more than 100 alternatives for Windows, Mac, Linux, Android and iPhone.
Master PDF Editor is complete solution for editing PDF and XPS files. You can insert, edit, remove, copy, add images or graphics. Export, import, remove and change page layouts. Also Master PDF Editor provides full functionality for changing PDF information, including author...
Russia
Native macOS app for viewing, annotating, and editing images and PDFs, featuring tools for cropping, rotating, resizing images, rearranging pages, full-screen viewing, markup, document merging, batch conversion, and export in multiple formats.
United States
Create, Convert, Review and Edit PDF Documents on Windows, macOS, and Linux.
United States
Xodo is the ultimate cross-platform PDF viewer and annotator. Powerful, fast, and optimized for all phones and tablets, Xodo makes it easy to access, edit, share, sync, manage, sign, and more.
Canada
Nitro offers comprehensive PDF solutions for editing, creating, and converting, alongside OCR and e-signature tools. Supports Mac, Windows, and iOS, providing a user-friendly interface with industry-standard security features. Ideal as an Adobe Acrobat alternative.
United States
Privacy-first PDF utility (Zero-Server Architecture). Merge, split, compress, and edit PDFs 100% locally on your device. No uploads, no servers, no tracking.
The top AEC PDF app to markup and manage drawings and documents. Ideal for replacing pen and paper, avoid printing documents again by using our intuitive feature set that makes marking up a PDF easy. Open or create a new PDF, markup using our extensive array of tools, then save...
Australia
Simple Android PDF viewer based on pdf.js and content providers. The app doesn't require any permissions.
Canada
Integrating powerful tools for book annoation, mindmapping, flashcards and more, to build up your reading notes as never before.
China
Comprehensive solution for editing, signing, form filling, OCR scanning, commenting, converting, and redacting PDFs, with AI-driven analysis and content extraction, data export to spreadsheets, text-to-speech, seamless use across desktop and mobile, and batch processing.
Taiwan
Open-source PDF viewer and editor using Qt framework, featuring hardware-accelerated rendering, encryption, multithreading, text-to-speech, annotation tools, form filling, high-res monitor support, document compression, audio book conversion, and signature validation.
Czechia
EU
Document Viewer is a highly customizable document viewer for Android, fork of the last GPL version of EBookDroid .
GermanyEU
