Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF.
License: Open Source
MuPDF is a free and open-source software framework written in C that implements a PDF, XPS, and EPUB parsing and rendering engine. It is used primarily to render pages into bitmaps, but also provides support for other operations such as searching and listing the table of contents and hyperlinks. Developed by Artifex Software, Inc.
License: Open Source
Feature | Skim | MuPDF |
---|---|---|
Clean design | ||
Export annotations | ||
Lightweight | ||
Notetaking | ||
PDF annotation | ||
Low memory usage | ||
Highlighter | ||
Optimal performance | ||
Fill PDF Forms | ||
Edit PDF | ||
Handwriting recognition | ||
Multiple languages | ||
Export to PDF | ||
Document annotations | ||
Sync between devices | ||
PDF OCR | ||
Customer support | ||
Cross-platform | ||
Portable | ||
Vim key mapping | ||
Add/remove pages | ||
Bates numbering | ||
Customizable | ||
Built-in Image converter | ||
Image resizing | ||
Built-in viewer | ||
Scan documents | ||
Browser integration | ||
Browser extension | ||
Google Drive integration | ||
Night mode/Dark Theme | ||
Ad-free | ||
Create PDF files | ||
Print to PDF | ||
Vi keybindings | ||
Superb keyboard navigation | ||
Document reader | ||
File transfer | ||
Freehand Writing |