1. Project Management
    1. Basecamp
    2. GroupMindExpress
    3. 5pm
    4. ActiveCollab
    5. Staction
    6. Daptiv
    7. Task2Gather
    8. Planyp.us
    9. CoMindWork
    10. Colabolo
    11. eLoops
    12. ClockingIT
    13. Klok
    14. PieMatrix
    15. Teambox
    16. Smartsheet
  2. Event Scheduling
    1. eventbrite
    2. Schedgit
    3. GCalendar
    4. Timebridge
    5. any iCal app
    6. Chandler
    7. Amiando
    8. Doodle.com
    9. Genbook
    10. AgreeAdate
    11. MeetWithApproval
    12. Cvent
    13. Tungle
    14. Shiftboard
  3. for more info about Online Collaboration Tools see Robin Good's MasterNewMedia
  4. www.MasterNewMedia.org
  5. Collaborative Writing
    1. Buzzword
    2. Zoho Writer
    3. Writeboard
    4. Google Docs
    5. Quicktopic
    6. SynchroEdit
    7. Gobby
    8. Etherpad
    9. TextFlow
    10. WriteWith
    11. ThinkFold
    12. Springloops
      1. for coders
    13. Mixedink
  6. Chat
    1. Userplane
    2. Tinychat
    3. CampFire
    4. Meebo
    5. Zoho Chat
    6. Chatterous
  7. Instant Messaging
    1. Skype
    2. AOL IM
    3. Meebo
    4. eBuddy
    5. Yahoo Messenger
    6. Google chat and video
    7. ICQ
    8. Windows Live Messenger
    9. Jabber
  8. VoIP - Audio Conferencing
    1. Skype
    2. ooVoo
    3. Voxox
    4. JahJah
    5. REBTEL
    6. GTalk
    7. Vyke
    8. Gizmo5
    9. Voxli
    10. Voxopop
  9. Collaborative Reviewing
    1. Backboard
    2. Creately
    3. A.nnotate
    4. Diigo
    5. uptogo
    6. ReviewBasics
    7. ConceptShare
    8. Octopz
    9. Textflow
    10. inMotionNow.com
    11. Buzzword
    12. Cozimo
    13. Workflow & Review
    14. Friendpaste
    15. ProofHQ
    16. Colaab
    17. Revizr
    18. FuzeMeeting
    19. Huddle.net
    20. Oryx Editor - BPMN Community
  10. Screen-Sharing
    1. GoToMeeting
    2. eBLVD
    3. ConnectNow
    4. Microsoft Shared View
    5. Yuuguu
    6. WebExNow
    7. LiveLook
    8. Vyew
    9. Crossloop
    10. Glance
    11. Yugma
    12. Teamviewer
    13. BeamYourScreen
    14. Remote Control
      1. GoToAssist
      2. RealVNC
      3. GoToMyPC
      4. logmein
      5. Teamviewer
      6. TightVNC
      7. LiveLook CoBrowsing
      8. Proxy Pro6
    15. Acrobat.com
    16. Netviewer
    17. Mikogo
    18. Gogrok
    19. PocketMeeting
    20. Oneeko (Skype plugin)
    21. Present.io
    22. ShowDocument
    23. Dynno
    24. GoGrok
  11. MindMapping & Diagramming
    1. Creately
    2. MindMeister
    3. Bubbl.us
    4. Mind42
    5. Mywebspiration
    6. Spinscape
    7. Gliffy
    8. LucidCharts
    9. Xmind
    10. SpicyNodes
    11. Creately
    12. MindJet Catalyst
    13. Comapping
  12. Video Conferencing
    1. Gchat
    2. Skype
    3. TokBox
    4. Oovoo
    5. Sightspeed
    6. VSee
    7. Mebeam
    8. Flashmeeting
    9. EyeJot
    10. DoVisio
    11. APideo
    12. XyKast
    13. Palbee
    14. Scopia Desktop
    15. Meeting24
    16. Persony
    17. InstantPresenter
    18. Tinychat
    19. HP SkyRoom
    20. Wetoku
    21. VisionKontakt
  13. File Sharing
    1. Microsoft Live Mesh
    2. Filedropper.com
    3. Filemail.com
    4. youSendIt
    5. drop.io
    6. transferbigfiles.com
    7. box.net
    8. dropbox
    9. senduit
    10. 4shared.com
    11. Virtual desktops
      1. Jooce
    12. Clip2Net
    13. Spider Oak
    14. Gigashift
    15. Filephile
    16. KnowledgePlaza.be
    17. Esnips.com
    18. Verzend
    19. Zapr
    20. Rapid Share
    21. Wuala
  14. Private Social Networking Platforms
    1. Googlegroups
    2. YahooGroups
    3. Ning
    4. Socialcast
    5. Friendfeed
    6. Cubetree
    7. Yammer
    8. Groupsite
    9. BantamLive
    10. Yammer
    11. Campfire
    12. WizeHive
  15. Large Audience Webinars
    1. Gatherplace
    2. GoToWebinar
    3. iVocalize.com
    4. HotConference.com
    5. Wiziq
    6. Live Web Seminar.com
  16. Co-browsing
    1. Clavardon
    2. Holoday
    3. PageShare
    4. Showdocument
    5. Flowgram
      1. asynchronous
    6. Wizlite - Page highlighting
      1. asynchronous
    7. Twiddla
  17. Virtual 3d Immersive Coolaboration
    1. Tixeo
    2. I-maginer
    3. Teleplace
  18. Web Conferencing
    1. WebEx
    2. Elluminate
    3. Wimba Classroom
    4. DigitalSamba (free for 3)
    5. Centra
    6. Elluminate VRoom (free for 3)
    7. Adobe Connect Now (free for 3)
    8. WebTrain (free for 2)
    9. iVocalize
    10. DimDim
    11. Spreed
    12. WebHuddle
    13. Convenos
    14. Zoho Meeting
    15. Acrobat.com
    16. OpenHuddle
    17. Microsoft Live Meeting
    18. iLinc
    19. Genesys
    20. Omnovia
    21. ReadyTalk
    22. e-Lecta
    23. Hypermeeting
    24. Lotus LiveEngage
    25. Live Conference PRO.com
    26. Expressway Flexchat
    27. WebConference.com
    28. DoConference
    29. Nefsis
    30. OpenMeetings
    31. vMukti MeetingPlace
    32. OpenConference
    33. Wiggio
  19. Web Presenting
    1. Slideshare
    2. SlideRocket
    3. woices.com
    4. PresenterNet.com
    5. InstantPresenter
    6. Vcasmo
    7. 280 Slides
    8. Livemeetups
    9. Freepath
    10. Multimedia Presentations
      1. Vuvox
      2. Animoto
      3. OneTrueMedia
      4. Scrapblog
      5. bubbleshare
      6. Voice Thread
      7. Zentation
      8. Present.io
    11. Kineticast
  20. Whiteboarding
    1. Dabbleboard
    2. Skrbl
    3. Vyew
    4. Ge Inspiration Cubed
    5. Depicto
    6. Twiddla
    7. Scriblink
    8. Groupboard
    9. Scribblar
    10. ShowDocument
    11. Flowchart
    12. Virtual whiteboard
  21. WorkGrouping
    1. meetup
    2. grouply
    3. Broadchoice Workspace
    4. WebOffice
    5. BarCamps
    6. Edmodo.com
      1. Microblogging for Education
    7. Affinitiz.com
      1. Rooms for teams + external blog
    8. Colaab
    9. Sosius
    10. Deskaway
    11. Collaber
    12. Campfire
    13. CentralDesktop
    14. GroupmindExpress
    15. MindQuarry
    16. Ovosuite
    17. Clearspace
    18. SocialGo
    19. Sosius
    20. MyNetResearch
    21. OneDrum
    22. Onehub
    23. Huddle.net
    24. Ubidesk
    25. HyperOffice
    26. WizeHive
    27. TeamApart
    28. Ubidesk
    29. Wiggio
    30. FMYI
    31. Collaboroo
    32. GlassCubes
  22. Document Sharing - Wikis
    1. Comindwork
    2. pbwiki
    3. WetPaint
    4. wikidot
    5. mediawiki
    6. wikispaces.com
      1. for teachers
    7. GoogleDocs
    8. GoogleSites
    9. Socialtext
    10. Zoho
    11. mindtouch Deki
    12. etherpad
    13. Couchit
    14. Database Publishing
      1. blist
      2. Tablefy
      3. Listphile
      4. Dabble DB
    15. Document Publishing
      1. Scribd
      2. Issuu
      3. Docstoc
      4. Acrobat.com
    16. source control
      1. Subversion/Tortoise
    17. KnowledgePlaza.be
    18. Mixedink
    19. Microsoft SharePoint
    20. PBWiki