Powerpoint or more
Tools zimmerman
http://www.authorstream.com/Dashboard turn powerpoint into video
http://freemypdf.com/
http://titanpad.com/
work on a page simutaneoulsy in real time
http://uploadingit.com/

http://issuu.com/ publishing online
http://www.freetech4teachers.com/

http://edudemic.com/2010/07/the-100-best-and-free-online-learning-tools/

http://www.simplek12.com/teacher-professional-development

Google tricks: Find Specific Documents - Say you want to find a PowerPoint Presentation on any topic. By using "filetype:ppt" in your search term, you can return results that are only PowerPoint files or a pdf "filetype:pdf"