DocuPUB - DocuPUB is an online file converter, file merger, file compressor, and file resizing tool.
Adobe Acrobat DC - Make your job easier with Adobe Acrobat DC, the trusted PDF creator. Use Acrobat to convert, edit and sign PDF files at your desk or on the go.
PDF Joiner - This online tool allows you to join several PDF documents into a single file, free of charge.
Wondershare PDFelement - All-in-one PDF editor
7-PDF Split & Merge - Functions: Split pdf-files, Merge pdf-files together
Microsoft Word - Microsoft Word is a commercial word document processor for Windows.