For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
Animoto - Create your own videos or book trailers
Chogger - Comic Strip Creator
CoolText - Create cool text logos and graphics
dumpr - Photo fun!
TimeToast - Create timelines for presentations or to share on the web.
Free Play Music - Get free music to add to your presentations
Prezi - Create a different kind of presentation and WOW your teacher!
Tagxedo - Word Clouds with Style!
Wordle - Create beautiful word clouds