PDF-XChange Audience is definitely an alternate viewer for PDF files that allows one to annotate and view PDF files. You can include sticky notes, text, and additional annotations and conserve them for the docu...
Foxit PDF Editor2.0
Foxit PDF Editor is a tool for modifying page contents in Portable Document Format (PDF) documents. Unlike other so-called "PDF Editors", which are designed only to work with "Notes" and limited page