Here is a short list of Free software and plugins related to PowerPoint to make your life easier. You’ll wonder how you lived without some of these amazing FREE programs for so long. These are all written by Microsoft and are completely free. There are a LOT more where these came from, these are some that I suspect you may not know about yet.
pptPlex
http://www.officelabs.com/projects/pptPlex/Pages/default.aspx
This tool enables you to zoom into and out of your PowerPoint slides, as well as jump between non-sequential ones. Once it's installed, launch PowerPoint and view the video tutorial to find out how to use it.
Microsoft Office Compatibility Pack
http://support.microsoft.com/kb/923505
This tool enables users of Office 2000, XP and 2003 to open, edit and save documents in the new 2007 formats in Word, Excel and PowerPoint. Install it and the functionality is immediately available in Office's File Open and Save As dialogue boxes.
Microsoft Office Viewers
Website
Don't have access to a copy of Office on another computer? You can now install special Viewers for Microsoft Word, Excel, Access, Visio or PowerPoint documents, enabling you to open, look at and print your work without having to download Office.
Microsoft Producer For PowerPoint
http://www.microsoft.com/downloads/en/details.aspx?FamilyId=1B3C76D5-FC75-4F99-94BC-784919468E73&displaylang=en
This free-to-use add-on for PowerPoint makes it incredibly simple to create web-based presentations from existing PowerPoint slides. You can also use it in association with other media sources, such as video, audio and images.
You'll need to use the Microsoft Office Animation Runtime plug-in unless you're running Office 2007 – a handy download link is provided on the Microsoft Producer download page.
Ribbon Hero
http://www.officelabs.com/ribbonhero
The Ribbon interface was a great step forward for Office 2007 and 2010, but if you want to get the most of it, install Ribbon Hero.
It monitors what you do in Office and makes suggestions as to which features you should learn about that could help you do your work more efficiently. It also helps you learn about the Ribbon interface using games and tasks that can be played with your friends and colleagues.
A more comprehensive list can be found here that has a much longer list of 60 fantastic free software downloads essential to any PC user.
Read more: http://www.techradar.com/news/software/applications/60-best-free-pc-software-downloads-from-microsoft-914749#ixzz19cqeQver