Not only is it an excellent alternative to Microsoft Office, it is a FREE
alternative. Yep, the software is free.
I've been using it for a couple of weeks and I've had no problems. Specifically I've been using the word processor and the spreadsheet. I've had no problem opening and working on MS Word and Excel files.
Here is a description from the OpenOffice.org site:
"The suite covers pretty much everything you need with a word processor, spreadsheet, presentation software, equation editor and a drawing program. It opens most major formats such as MS Office almost flawlessly (Macros aren't converted), saves to PDF, has comprehensive help, and spell checking in 15 languages."
Great money saver! You can download it here: