LibreOffice is a free suite of apps for producing text documents, spreadsheets, presentations, and more, which you can then save in Microsoft Office formats.
The writer is the word processor inside LibreOffice. Use it for everything, from dashing off a quick letter to producing an entire book with tables of contents, embedded illustrations, bibliographies, and diagrams.
Calc tames your numbers and helps with difficult decisions when you’re weighing the alternatives. Impress is the fastest and easiest way to create effective multimedia presentations.
Draw lets you build diagrams and sketches from scratch. A picture is worth a thousand words, so why not try something simple with box and line diagrams? The base is the database front-end of the LibreOffice suite.
Math is a simple equation editor that lets you lay-out and display your mathematical, chemical, electrical, or scientific equations quickly in standard written notation.