Well, this has to be my favourite free office suite. Available for more operating systems than you can shake a stick at.
"LibreOffice is a powerful office suite – its clean interface and feature-rich tools help you unleash your creativity and enhance your productivity.
LibreOffice includes several applications that make it 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),
- Math (formula editing)."