Here are a few examples of cloud-based applications. I’ll find more, but for now, please poke at these.
Audio editing online http://aviary.com/tools/audio-editor
Image editing online: http://aviary.com/tools/image-editor
Photoshop online: http://www.photoshop.com/tools?wf=editor
A bunch of online, open source resources (think replacing the textbook)http://www.curriki.org/xwiki/bin/view/Main/WebHome
We also add to this the google suite of tools. but just in case,
Word: http://writer.zoho.com/home?serviceurl=%2Findex.do
Excel: http://www.editgrid.com/
Access: http://www.zoho.com/creator/index.html
Powerpoint: http://prezi.com/
And of course hundreds of spectacular sites dedicated to content-specific material (this is just an example, I think you get the basic idea)
http://www.the-map-as-history.com/
http://maps.google.com/
http://www.pixton.com/schools/overview
http://bm.nmolp.org/creativespaces/?page=home
http://www.nasa.gov/externalflash/PQTimeline/
http://www.tripline.net/