If you wish to create PDF files then you will need to purchase the full Adobe Acrobat package. An excellent meta-search tool that, in its free version, harnesses teh power of about a dozen different web search engines. Many software packages are available in a trial form so that you can download the software, try it out and then buy it if you like it. These packages are usually hobbled in some way. It is like Photoshop, but with fewer features.
Sources are for illustration only.