I am looking for a tabbed PDF reader, preferably with annotation support (highlighting mostly) for Mac OS X. I looked at the Skim FAQ which said that tabs would never come to Skim.
I am currently writing where I need to have multiple PDFs open for reference (at the moment 17). This is a lot of windows which clutters upp my Exposé.
Does anybody know if such a PDF reader exists for Mac OS X?
I have had a look at Adobe Acrobat Reader, Skim, Preview.app, PDF Pen.
I found Dioretsa which has tabs, but no sadly no annotation.
Update 2012-05-16: Saving annotations in the PDF itself is also a must. E.g. Skim and Mendeley do not do this. Otherwise, Mendeley would have been a good choice.