Apache OpenOffice (AOO) is an open-source office productivity software suite. It is a successor project of OpenOffice.org and integrates features and improvements from IBM Lotus Symphony. Apache OpenOffice is a close cousin of LibreOffice and NeoOffice. It contains a word processor (Writer), a spreadsheet (Calc), a presentation application (Impress), a drawing application (Draw), a formula editor (Math), and a database management application (Base).

(souvent abrégé en AOO) est un projet de la fondation Apache visant à produire une suite bureautique libre et gratuite.