OpenOffice.org 2.2.1 (great free alternative for Microsofts office)
OpenOffice.org 2 is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose.
Writer (alternative for microsofts "Word")
For all your documents
WRITER has everything you would expect from a modern, fully equipped word processor or desktop publisher.
It's simple enough for a quick memo, powerful enough to create complete books with contents, diagrams, indexes, etc. You're free to concentrate on your message - while WRITER makes it look great.
Impress (alternative for microsofts "Powerpoint")
More power to your presentations
IMPRESS is a truly outstanding tool for creating effective multimedia presentations. Your presentations will stand out with 2D and 3D clip art, special effects, animation, and high-impact drawing tools.
Create equations and formulae for your documents
MATH is OpenOffice.org's component for mathematical equations. It is most commonly used as an equation editor for text documents, but it can also be used with other types of documents or stand-alone. When used inside WRITER, the equation is treated as an object inside the text document. Similarly, one can also insert these into other OpenOffice.org programs like CALC and IMPRESS.
The powerful graphics package
DRAW - from a quick sketch to a complex plan, DRAW gives you the tools to communicate with graphics and diagrams.
'Park' your most commonly used drawing tools around your screen ready for single-click access.
Use Styles and Formatting to put all your graphics styles at your finger tips
Calc (alternative for microsofts "Excel")
The all-purpose spreadsheet
CALC is the spreadsheet program you've always wanted. Newcomers find it intuitive and easy to learn; professional data miners and number crunchers will appreciate the comprehensive range of advanced functions.
Advanced DataPilot technology makes it easy to pull in raw data from corporate databases; cross-tabulate, summarise, and convert it into meaningful information.
Base (alternative for microsofts "Access")
The new way to access databases
New to Version 2, BASE enables you to manipulate database data seamlessly within OpenOffice.org. Create and modify tables, forms, queries, and reports, either using your own database or BASE’s own built-in HSQL database engine. BASE offers a choice of using Wizards, Design Views, or SQL Views for beginners, intermediate, and advanced users.
For more info or other languages http://www.openoffice.org