An older Office OpenOffice 4.0 has five main programs; Writer, the Calc spreadsheet, Impress presentation software, Base and Draw, plus Math, a formula editor.

Money for nothing, office for free OpenOffice 4.0 overhauls user interface, boosts Microsoft compatibility LibreOffice isn't the only open source office in town.

Lagging slightly behind Microsoft Office in features, Apache OpenOffice has a lot of functionality and flexibility, as well as tight integration among components. It's also free and open-source.