OpenOffice.org 1.1 is an open, feature-rich multi-platform office productivity suite. The user interface and the functionality is very similar to other products in the market like Microsoft Office or Lotus SmartSuite, but compared to these commercial products OpenOffice.org is absolutely free.

Features:

1. OpenOffice.org Writer is a full-featured word processor
2. Calc provides full spreadsheet functionality incl. a huge number of statistical and scientific functions, pivot tables and charts.
3. Impress is a full-featured presentation tool that allows to create and modify diagrams and pictures right within the application
4. Draw is a drawing tool that supports both vector and bitmap images.
5. With the database tools in OpenOffice.org users can easily access and analyze data, create complex reports or do a mail merge based on a customer database.
6. OpenOffice.org is able to read and write Microsoft Office files.
7. introduces the one-click PDF export feature that enables you to easily create PDF files without the need for any additional third party software.
8. can export presentations and drawings to the Macromedia Flash format (.swf).
9. Other Features can be found here http://www.openoffice.org/dev_docs/features/1.1/index.html