The Best Skim Alternative: Top PDF Readers for Mac & Beyond
Skim is a popular PDF reader and note-taker for OS X, renowned for its ability to help users read and annotate scientific papers and view various PDF files. While Skim is excellent, users often seek alternatives for various reasons, including cross-platform compatibility, additional features, or different user interfaces. This guide will explore the best Skim alternatives available to enhance your PDF experience.
Top Skim Alternatives
Whether you're a student, researcher, or professional, finding the right PDF reader can significantly impact your productivity. Here are some of the top contenders that offer robust features and a smooth reading experience, often surpassing Skim in specific areas.

SumatraPDF
SumatraPDF is a slim, free, and open-source PDF viewer primarily for Windows, making it a strong Skim alternative for PC users. It boasts a minimalistic design, lightweight footprint, and low memory usage, perfect for quick document viewing. Key features include a tabbed interface, highlighting, optimal performance, and support for multiple formats like DjVu, EPUB, and MOBI, offering more versatility than Skim for some users.

Foxit Reader
Foxit Reader is a free PDF software that offers extensive capabilities for creating, annotating, sharing, and collaborating on PDF documents. As a multi-platform Skim alternative, it supports Mac, Windows, Linux, Android, and iOS. Its robust features like PDF annotation, filling PDF forms, text highlighting, and support for Javascript make it a powerful choice for users needing more than just basic viewing.

Evince
Evince is a free and open-source document viewer for Linux, supporting a wide array of formats including PDF, Postscript, DjVu, and comics books. For Linux users, Evince is an excellent Skim alternative due to its lightweight nature, PDF annotation capabilities, and multi-language support, providing a streamlined experience for various document types.

Okular
Okular is a universal document viewer developed by KDE, offering cross-platform compatibility across Linux, Windows, and Mac OS X, making it a versatile Skim alternative. It's free and open-source, featuring PDF annotation, lightweight design, low memory usage, and text highlighting, which makes it ideal for users who need a powerful yet efficient document viewer for various operating systems.

Adobe Acrobat Reader DC
Adobe Acrobat Reader DC is a powerful freemium software for viewing, printing, and annotating PDFs, deeply integrated with Adobe Document Cloud. Available on Mac, Windows, Android, and iPhone, it serves as a comprehensive Skim alternative for users needing advanced editing capabilities, document annotations, and seamless sync across devices, though some features are behind a paywall.

PDF-XChange Viewer
While PDF-XChange Viewer has been discontinued and replaced by PDF-XChange Editor, it was a popular freemium Windows alternative known for its PDF annotation, OCR capabilities, and lightweight design. Users looking for similar functionality should consider its successor, PDF-XChange Editor, for a robust Skim alternative on Windows.

MuPDF
MuPDF is a lightweight, free, and open-source PDF and XPS viewer available across Windows, Linux, Android, and iOS. Its renderer is known for high-quality anti-aliased graphics and precise text rendering. As a Skim alternative, MuPDF is an excellent choice for users prioritizing speed, portability, and minimal resource consumption, even on mobile devices.

PDF-XChange Editor
PDF-XChange Editor is a commercial Windows PDF editor and viewer, offering a feature-rich experience beyond basic viewing. It's a powerful Skim alternative for Windows users needing direct content editing, OCR, PDF creation, and advanced annotation tools like stamps and visual bookmarks. Its extensive customization options and robust features make it suitable for professional use.

Preview
Preview is a built-in, free application on Mac, offering simple and elegant viewing and editing of images and PDF documents. For Mac users seeking a native Skim alternative without installing third-party software, Preview is an excellent choice. It allows basic PDF editing, filling forms, and includes built-in image conversion and resizing functionalities.

Document Viewer
Document Viewer is a highly customizable, free, and open-source document viewer for Android devices. Forked from EBookDroid, it caters specifically to Android users looking for a versatile mobile Skim alternative. While its features are focused on mobile use, its customizable nature allows for a tailored reading experience on Android phones and tablets.
Choosing the best Skim alternative depends heavily on your operating system, specific feature requirements, and whether you prioritize free, open-source, or commercial options. Explore these alternatives to find the perfect PDF reader that aligns with your workflow and enhances your document management.