Evernote today updated Skitch for OS X and iOS to version 2.5, adding a PDF annotation feature that is aimed at Evernote Premium users.
With PDF annotation, files can be modified with shapes, arrows, and text. Important passages can be highlighted and instructions can be added, which makes Skitch an even better collaboration tool. PDFs are sent with a summary of all annotations.
Skitch for Mac [Direct Link]
Skitch for iOS [Direct Link]
Article Link: Skitch for Mac and iOS Updated with PDF Annotations and Stamps