Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF, but is also great for viewing any PDF file.
* Viewing PDFs
* Adding and editing notes
* Highlighting important text
* Making "snapshots" for easy reference
* Navigation using table of contents or thumbnails
* View all your notes and highlights
* Convenient reading in full screen
* Giving powerful presentations
* Handy preview of internal links
* Focus using a reading bar
* Magnification tool
* Extensive AppleScript support
* Support for Apple Remote Control
* Interaction with LaTeX and PDFSync
* Spotlight support
* Highly customizable
* And much more...
These details are provided for information only. No information here is legal advice and should not be used as such.