Its wide range of apps tackles the vast majority of office-related workflows. While there are many word processors and cheap or free programs that try to deliver a full office setup, Libre Office is one of the most comprehensive. It is a versatile and powerful set of programs, though it's worth noting that it emulates the older core set of apps from Microsoft Office and doesn't have equivalents to newer programs like OneNote. It's one of the best free office suites of applications around and has programs for word processing, spreadsheets, presentations, and more. LibreOffice originally forked off of OpenOffice and has been regularly maintained and developed over the years.
The first thing that catches the eye about LibreOffice is the price tag, or more specifically the lack of one.