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Skim (software)
open-in-new
<p>Skim is an open-source <a href="/facts/PDF_reader/nDD0mQ1B">PDF reader</a>. It is notably the first <a href="/facts/Free_software/IaoVtJXn">free software</a> PDF reader for <a href="/facts/MacOS/Y93vVpTm">macOS</a>. It is written in <a href="/facts/Objective-C/5mM557BW">Objective-C</a>, and uses <a href="/facts/Cocoa_API/p10p5aFI">Cocoa APIs</a>. It is released under a <a href="/facts/BSD_licenses/XLtmLp5x">BSD license</a>. It is also cited as being able to help annotate and read scientific papers. </p>