PDFCreator

PDFCreator is an application for converting documents into Portable Document Format (PDF) format on Microsoft Windows operating systems. It works by creating a virtual printer that prints to PDF files, and thereby allows practically any application to create PDF files by choosing to print from within the application and then printing to the PDFCreator printer. Between 2009 and 2012 PDFCreator included a controversial, optional closed source adware toolbar that was installed by default.