Collaboration and Writing Tools

Brainstorming & Getting Started
http://www.mindmeister.com--collaborative mind mapping
http://www.mycoted.com/Category:Creativity_Techniques --Creativity Bank
http://www.wridea.com/--brainstorm alone or with others

Diagramming & Charts
http://www.mxgraph.com/index.html
http://www.gliffy.com/--draw & share diagrams online
http://drawanywhere.com/--draw, share, & export diagrams
http://bubbl.us/--charts
http://www.best4c.com/--very comprehensive chart making site
http://flowchart.com/--charts

Tools for Writing Together (besides Google Docs)
http://www.conceptshare.com/--allows users to respond to design
http://www.scribd.com/--post documents, get public feedback
http://www.writeboard.com/--collaborative writing similar to google docs
http://www.scriblink.com/--online whiteboard (no registration needed)
http://www.plotbot.com/--write screenplays together or solo
http://viewbook.com/--make a portfolio (intended for artwork)
http://mixbook.com/--make collaborative photobooks (order hard copies)
http://www.solodox.com/--web-based word processor w/sharing options
http://yourdraft.com/--web-based word processor w/sharing options
http://writer.zoho.com/--online word processor
http://product.thinkfree.com/desktop/write/--online word processor
http://www.buzzword.com/--Adobe's new online word processor, very pretty interface, but still buggy
http://www.peepel.com/--collaborative online word processor

Digital Genres
http://www.glogster.com/--make digital posters
http://issuu.com/--make digital magazines from pdfs to embed in webpages or blogs
http://www.flip.com/--make digital pages from images, sketches, text, audio, & video
http://letterpop.com/--make digital newsletters

Citation Generators
http://citationmachine.net/
http://www.easybib.com/

Getting Together
http://www.meetwithapproval.com/--find a common meeting time
http://officezilla.com/--web-based collaboration tools: to do lists, calendars, contacts, chat, discussion board, etc. (similar to Google Groups)
60+ Collaborative Tools for Groups (from Mashable.com)

Paper & Printable Things
http://www.incompetech.com/--Graph paper, calendars, etc.
http://www.thetoymaker.com/--Paper toys
http://www.pocketmod.com/--Personal mini-organizer:

Other
http://www.rememble.com/--keep track of all of your digital bits & pieces
http://notebook.zoho.com/--collect digital bits & pieces and share with others