Free software that can do various things such as creating, combining and splitting PDF files, moving / adding / deleting pages, adding pages from PDF to PDF, changing information in PDF, adding ...
Even if you do not install the latest version of Word and OpenOffice.org, free software that can convert PDF files and RTF files opened with WordPad from each format is called "NW Docx Converter"is.
Whatever you need to convert to PDF format (or vice versa), Adobe Acrobat Pro DC is the tool for you. It gives you total freedom to create PDFs from scratch and edit existing documents without fuss, ...