LibreOffice – one of the most powerful Free and Open Source office suite on the market.

LibreOffice is a powerful office suite – it includes several applications that make it one of the most powerful Free and Open Source office suite on the market.

Writer (word processing),
Calc (spreadsheets),
Impress (presentations),
Draw (vector graphics and flowcharts),
Base (databases), and
Math (formula editing).

FREE download: https://www.libreoffice.org/download/download/