Apache OpenOffice | The free and Open Source productivity suite

Apache Open Office is the leading open-source office software suite. It features word processing, spreadsheets, presentations, graphics and databases. It is available for all major operating systems. Open Office has the ability to automate features using recorded and manually created macros, created using a number of different programming languages

• 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
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Download : sourceforge.net  Offical site: openoffice.org