iEtherPad allows users to word process in real time. Great for brainstorming! CAN also use asynchronously. Users need the URL. Creating an account allows you to have your own iEtherPad url as well as designate yourself and selected others as administrators.
REAL, real time brainstorming
Easy to use
Membership is free
Public pads do not need membership
Administrator can add a password to a public pad
Only Administrators has access to security and can change pad to public and add a password.
Public AND password protected allow anyone with the url AND password to write, so students do not need to join or have email.