LibreOffice is a complete open source alternative to Microsoft Office. It includes, Writer (word processing), Calc (spreadsheets), Impress (presentations), Base (databases), Math (formula editing), and Draw. Draw is an alternative to Microsoft Publisher for creating multi-page layouts. Open, edit, and create many different file formats including .PUB, .PDF, .DOC, .DOCX, and many more!
Believe it or not, most commercially available software has a FREE twin! (Or at least distant cousin!)