Web 2.0 Tools
Stixy - share ideas, images, files and more on your wall
http://Stixy.com
AudioBoo - audio tool for creating audio files (also mobile apps)
http://audioboo.fm/
Delivr - Create QR codes and more (example)
http://delivr.com/
Markup - mark and remark on webpages and discuss with others
http://markup.io/
Little Bird Tales - online writing tool for little learners
http://littlebirdtales.com/
Twiddla - online "meetings and more" (example)
http://www.twiddla.com/
iPadio - live broadcast audio or podcasting (also mobile apps)
http://www.ipadio.com/
Voicethread - online commenting in audio, video or text (an example)
http://voicethread.com/
Minus - sharing files and images (an example)
http://minus.com
Yola - Free website building and hosting tool
http://yola.com
Myna - online free audio mixer/editor
http://aviary.com/online/audio-editor#
Soundcloud - record audio and have comments (also mobile apps)
http://soundcloud.com
In case I missed YOUR boat...
Here is a huge collection of collections:
http://livebinders.com/play/play/157501#