PDF-XChange Editor from Tracker Software.
Create, View, Edit, Annotate, OCR and Digitally Sign PDF files plus much more.
Package will uninstall PDF-XChange Viewer as that product has been discontinued.
This package installs the free version. To enable all features please purchase licenses from https://www.tracker-software.com/product/pdf-xchange-editor
Please note that this version doesn't appear to work with Vista/2008 64-bit.