Why Apache OpenOffice?

Apache OpenOffice is synonymous with quality:

The roots of Apache OpenOffice go back twenty years, creating a mature and powerful product

Many millions of users
Independent reviewers around the world have recommended the product
With a fully open development process, Apache OpenOffice has nothing to hide - the product stands or falls on its reputation

Apache OpenOffice is easy to use:

The software looks and feels familiar and is instantly usable by anyone who has used a competitive product
It's easy to change to Apache OpenOffice - the software reads all major competitors' files
Few language barriers - if it's not yet available in your language, the chances are it will be soon
Apache OpenOffice is supported by a global community of friendly volunteers, happy to provide assistance to newcomers and advanced users alike

Apache OpenOffice is free software:

You may download Apache OpenOffice completely free of any license fees
Install it on as many PCs as you like Use it for any purpose - private, educational, government and public administration, commercial... Pass on copies free of charge to family, friends, students, employees, etc.

Apache OpenOffice is standards compliant:

The first software package in the world to use OASIS OpenDocument Format (ISO/IEC 26300) as its native file format.

Some of the Apache OpenOffice Features

Cross platform (Windows, Linux, Mac OS X)
170+ Languages
Extensions and Templates available
Commercial support available
New Sidebar
Interoperability Improvements for Text Documents, Spreadhseet Documents, Presentation Documents and OOXML file format in general
DrawObject Improvements/Enhancements
New Color Palette
New Gradients
New Gallery Themes and Gallery enhancements
Refined the Selection Handles User Interface
Refined Selection Visualization
Better Print Preview
Enhanced conversion to Bitmap Graphics
Enhanced Copy/Paste
Enhanced Drag&Drop
Adapt LineStart/End to LineWidth
SVG Export enhancements
SVG/Metafile Break improvement
SVG Import improvements
Picture Crop mode offers preview
Unified visualization of ColorPalette popup
Transparency support for pixel formats (PNG)
Connectors support rotation
Corrected Hatch fill style visualization
Better gradient support in metafiles
Calc and Chart Improvements/Enhancements
Support relative Pie Chart Height
New Functions: AVERAGEIFS, COUNTIFS, SUMIFS, XOR, LEFTB, RIGHTB, LENB, MIDB and RAND (reimplemented to use the Mersenne-Twister algorithm)
Extensions Improvements/Enhancement
New Toolbar management
Unified menu API
Performance Improvements/Enhancements
Many resource leaks were fixed
Speedup of Graphic Rendering
Additional Language Support
Changes that Impact Backwards Compatibility
Module binfilter removed (legacy StarOffice file formats (.sdw, .sdc, .sdd, etc.)
Python support updated
Support for system C++ STL