Unknown popular sites

Audacity: Audacity® is free, open source, cross-platform software for recording and editing sounds.
VoiceThread:
Pintrest:
Articulate:
Animoto:
LiveBinders:
KhanAcademy
QuizLet
Scribd
Screenr
Instapaper
PollEverywhere
Lino: Sticky, Photo sharing
Doodle

Source:http://www.slideshare.net/janehart/toptools2012?utm_source=slideshow03&utm_medium=ssemail&utm_campaign=share_slideshow