1)   PDF-XChange Pro 5.0.257
All you will ever need to Create, view, edit/modify and print Adobe PDF files, Export PDF pages and files to Image Formats, Type on PDF pages and much much more. From the authors of PDF-XChange product line - Developer SDK available

 2)   PDF-XChange SDK For Developers 2.5
PDF-XChange and the PDF-Tools utility make arguably the smallest PDF files available form any PDF tool available - including Aobe's own products! Simple to use and offereing comprehensive features including encyrption - at an unbeatable price!!!