The collaborator’s toolkit
Notes
Jotspot – Take one set of notes, live. http://www.jotlive.com/
Mind mapping
Mayomi – Mind map & share. http://www.mayomi.com/
Whiteboard
Webbrush – Collaborative drawing, charting, etc. http://www.stanfy.com/dev/webbrush/
email, address book, calendaring, web documents, etc.
Zimbra – Work & communicate together. http://www.zimbra.com
your work organized instantly. really. foldera.com
Wordprocessor
Writely
Spreadsheat
Google
Todo
basecamp
Client feedback
TracBac makes it simple for designers / creators to share, comment, collaborate and interact with their clients. http://www.tracbac.com/admin/
Forum
getvanilla.com
(some day I will finish this)
EDIT: more like, it will be obsolete.