LibreOffice offers a suite of applications comparable to the Microsoft Office suite both visually and in functionality. LibreOffice is the successor to OpenOffice and has been around since 2010. LibreOffice has its own documentation and guides. Due to its high proliferation one can easily find & access documentation from around the web, including self-made tutorials on media platforms. Best of all, it is open source and free. Downloading is straight forward and can be found here.