Skim (software)

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Developer(s) Christiaan Hofman, Adam Maxwell, and Michael McCracken
Stable release
1.4.20 / June 20, 2016; 3 months ago (2016-06-20)
Written in Objective-C
Operating system Mac OS X
Available in Multilingual
Type PDF reader
License BSD

Skim is an open-source PDF reader. It is notably the first free software PDF reader for Mac OS X.[1] It is written in Objective-C, and uses Cocoa APIs. It is released under a BSD license. It is also cited as being able to help annotate and read scientific papers.[2]


Its primary release was in April 2007 at version 0.2. Within its first year it managed to gain a small fan base of users due to its ease of use and features which allowed some flexibility over other PDF browsers for Mac OS X. As of 2008 it had achieved version 1.0. Its main developers were also responsible for another popular open-source program, BibDesk.[3]


Some of its features include the ability to view and bookmark PDFs, highlight and underline selectable PDF text, and a Full Screen and Presentation mode. It also allows the adding of circles and boxes, as well as being able to embed and edit notes.[4]

See also[edit]


  1. ^, Adam Pash. "Download of the Day". Retrieved 2007-01-23. 
  2. ^ No Thick Manuals. "Open Source on Mac". Retrieved 2007-01-23. 
  3. ^ Michael McCracken. "Announcing Skim". Retrieved 2007-01-23. 
  4. ^ Mac the Web, Michael Mckee. "Skim - A better PDF reader". Retrieved 2007-01-23. 

External links[edit]