• activeCollab
  free open source project management and collaboration tool. from the developer of basecamp (paid online version).
  in software, fonts, stock images with collaboration free management opensource project share by 30 users
• ConceptShare
  Web-Based Idea and Design Sharing and Collaboration
  in temp with collaboration comment concept by 11 users
• CoWorking
  exploration of collaboration: technologies, tools, techniques, social processes, best practices
  The CoWorking Institute is an undertaking of the pioneer of technologies for collaborative work and play Bernard DeKoven and newsmaster Gerrit Visser. The home of Coworking and our Guides to the resources on Coworking, Twitter and Jaiku are dedicated to the exploration of collaboration, technologies, tools, techniquessocial processes, best practices
  in blogs & periodicals with collaboration coworking how practices process
• eGroupWare.org
  free software for your network. It enables you to manage contacts, calendars, todos and much more.
  egroupware
  in software, fonts, stock images with collaboration manage project share software
• google spreadsheets
  collaborative online spreadsheets
  in online software & services with collaboration peer software spreadsheets utility by 3 users (all private)
• Imagination Cubed
  collaborative sketching online
  in online software & services with collaboration sketch utility by 19 users
• O3Spaces
  document collaboration and sharing. version control. free extension to OpenOffice
  in online software & services with collaboration document sharing version
• Wayfaring
  shared personalized maps for connecting exploring and collaborating
  Create your own personalized maps, explore maps created by others
  maps personalized routes waypoints
  in online software & services with collaboration mapping maps peer share by 33 users
• Welcome to OpenPlans!
  OpenPlans is a platform for social activism. You want to make a difference, we want to make it easy. OpenPlans is the simple way to bring groups together, promote your cause, make plans, and get things done.
  in online software & services with collaboration management project by 4 users
• writeboard
  Collaborative writing software online with Writeboard. Write, share, revise, compare.
  in online software & services with collaboration textile tool writeboards by 24 users
• Yugma
  Free Web Conferencing, Online Meetings, Web Collaboration Service,
  in temp with collaboration conference meetings by 5 users

collaboration from all users