Free Microsoft Office alternatives

Scenario: Your teacher tells you to get finish a Powerpoint presentation started by your partner by tomorrow. The only problem is, you do not have Powerpoint. (or any part of the office suite) What are you supposed to do?

There are many free alternatives to Microsoft's Office suite, but a few stand out above the others:

• OpenOffice Suite: OpenOffice is a freeware open source alternative to Microsoft Word, Excel, Powerpoint, Equation editor, Frontpage and Access. The OpenOffice suite has the ability to open and save into Microsoft Office formats, as well as PDF (which Microsoft still fails to do) and it's own format. Almost every feature of Microsoft's product is available in OpenOffice, as well as some new features and access to a multitude of plugins. OpenOffice is available for Windows, Linux, Mac and even Solaris.
• Google Docs: Google Docs is a browser based alternative to Powerpoint, Excel, and Word. The basic features of Microsoft's suite are available in Google Docs. It is quite lacking in some respects. On the other hand, you can edit documents simultaneously with others
• Zoho: Zoho is very similar to Google Docs. You can even sign in with your Google account! Zoho has basically everything covered, less a few conversion issues.
• Thunderbird: Thunderbird, from Mozilla, is a replacement for Microsoft Outlook. It is quick, easy to use, and has alot of bells and whistles that make it one of the best choices to replace Microsoft's E-Mail client.
  

Why spend hundreds of dollars on Microsoft's Office Suite when you can use free alternatives that do the same thing?