OASIS OpenDocument XML format, multi-pane view, enhanced PDF support...
New in v3.0.x:
Mac OS X support, ODF 1.2 support, new Solver component, new Start Center, support for Microsoft Office 2007 Import Filters, Chart enhancements, improved crop feature in Draw and Impress, spreadsheet collaboration through workbook sharing, improved Notes Feature in Writer, New and improved "fresh-looking" icons; various other minor enhancements and bug fixes for earlier releases; Release Notes - Last Updated: 05.08.08 (v3.0.0 Beta Release)
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New in v2.3.0: Various minor enhancements and bug fixes for earlier v2.x releases; Release Notes - Last Updated: 09.17.07 (v2.3.0)
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New in v2.2.1 : Various minor enhancements and bug fixes for earlier v2.x releases; Release Notes - Last Updated: 06.12.07 (v2.2.1)
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New in v2.0.4: Various minor enhancements and bug fixes for earlier v2.x releases; Release Notes - Last Updated: 10.10.06 (v2.0.4)
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New in v2.0.2: Various minor enhancements and bug fixes for earlier v2.x releases; Release Notes - Last Updated: 03.07.06 Upgrade Meter:2
New in v2.0: OASIS OpenDocument XML format used as the default file format, multi-pane view, mail merge wizard, enhanced database front-end, enhanced PDF support, floating toolbars, new slide transitions and animation effects, support for nested tables, enhanced word count feature, digital signatures support, CustomShapes (compatible with Microsoft AutoShapes), XForms support, support for enum commands, new form control properties in MS filters, numerous other minor enhancements and bug fixes for earlier releases; Release Notes - Last Updated: 10.20.05 Upgrade Meter:5
New in v1.1.3: Numerous minor enhancements and bug fixes for earlier releases (complete list here); Release Notes - Last Updated: 10.04.04 Upgrade Meter:2
New in v1.1: Macro recorder; improved performance; enhanced file format support, including PDF (Portable Document Format) export, DocBook/XML import/export, XHTML export, and Macromedia Flash (SWF) export; support for full keyboard navigation and control; FTP file access component; various Office compatibility and other enhancements; Release Notes Upgrade Meter:5
Pros: Completely free suite of office utilities; automatic, nearly perfect conversion of Microsoft Office documents; extensive, powerful feature-set
Cons: Lacks an Outlook-type client, quite a bit slower than Microsoft Office, lacks some of the more advanced features of MS Office, macros and advanced formatting not always converted correctly to OpenOffice's Open XML file format