PDFill PDF Tools are FREE PDF functions to merge, split, reorder, delete, encrypt, decrypt, rotate, crop and reformat PDF pages, to add information, header, footer and watermark, to convert images to PDF, PDF to images or PostScript to PDF, to delete, flatten and list form fields, to scan to pdf, to create transparent image, and more. No watermarks! No pop-up ads! FREE for personal or commercial use! FREE distribution! Of course, PDFill has tools and options that can be purchased, but the basic tools option has just about every function you could ever need when working with PDF files. The image shows a screen shot of the free tools download. The Math Magazine has used this tool daily and so far, no problems at all to report.