Nitro Reader for Windows is not a traditional PDF reader that only does a good job in displaying your PDF documents. It can also create PDF files from plain documents, extract reusable images, fill in existing PDFs. Nitro includes tools that handle Word-to-PDF and other document conversions easily. With the free version of Nitro PDF Reader you can also save a signature and automatically stamp it on documents.
Nitro PDF Reader is a free download for Windows. The pro version, Nitro Pro is a jam-pack of extremely versatile features. Of course that comes with an extra cost.