Open Office (MS Office Alternative)

Features
1. Cross platform (Windows, Linux, Mac OS X)
2. 170+ Languages
3. Extensions and Templates available
4. Commercial support available
5. New Sidebar
6. Interoperability Improvements for Text Documents, Spreadhseet Documents, Presentation Documents and OOXML file format in general
7. DrawObject Improvements/Enhancements
8. New Color Palette
9. New Gradients
10. New Gallery Themes and Gallery enhancements
11. Refined the Selection Handles User Interface
12. Refined Selection Visualization
13. Better Print Preview
14. Enhanced conversion to Bitmap Graphics
15. Enhanced Copy/Paste
16. Enhanced Drag&Drop
17. Adapt LineStart/End to LineWidth
18. SVG Export enhancements
19. SVG/Metafile Break improvement
20. SVG Import improvements
21. Picture Crop mode offers preview
22. Unified visualization of ColorPalette popup
23. Transparency support for pixel formats (PNG)
24. Connectors support rotation
25. Corrected Hatch fill style visualization
26. Better gradient support in metafiles
27. Calc and Chart Improvements/Enhancements
28. Support relative Pie Chart Height
29. New Functions: AVERAGEIFS, COUNTIFS, SUMIFS, XOR, LEFTB, RIGHTB, LENB, MIDB and RAND (reimplemented to use the Mersenne-Twister algorithm)
30. Extensions Improvements/Enhancement
31. New Toolbar management
32. Unified menu API
33. Performance Improvements/Enhancements
34. Many resource leaks were fixed
35. Speedup of Graphic Rendering
36. Additional Language Support
37. Changes that Impact Backwards Compatibility
38. Module binfilter removed (legacy StarOffice file formats (.sdw, .sdc, .sdd, etc.)
39. Python support updated
40. Support for system C++ STL