Communication

Educreations - http://www.educreations.com/ - create your own "whiteboard podcasts" on your iPad

URL Shorteners
Tinyurl - http://tinyurl.com/ - shorten those long web addresses
Bit.ly - https://bitly.com/
Fur.ly - http://fur.ly/ - shorten multiple URLs into one

QR Codes - http://www.qrstuff.com/ - "quick response" codes; easy way to generate QR codes

Weebly - www.weebly.com - web site creation application with "drag and drop"  functionality
Examples:
Tech Camp - http://smctechcamps.weebly.com/
Eva's Classroom Site - http://griffin5.weebly.com/
Voki - http://voki.com/

Qwiki - http://www.qwiki.com/ - quick mash-up of information from the web

Remind 101 - www.remind101.com - a safe way to communicate