1. video conferencing
   1. gcaht
   2. Me Beam
   3. flashmeeting.
   4. vsee
   5. skype
   6. eyejot
   7. xykast
   8. palbee
   9. scopia desktop
   10. meeting24
   11. persony
   12. tinychat
   13. wetoku
   14. dovisio
   15. visionKontakt
   16. flashmeeting
   17. fonomo
   18. stickam
   19. instantpresenter
   20. yugma
2. voip: audio-conferencing
   1. oovoo
   2. voxox
   3. jajah
   4. rebtel
   5. google-talk
   6. vyke
   7. voxli
   8. skype
   9. hotconference
3. web-conferencing
   1. dimdim
   2. webex
   3. elluminate
   4. wimba classroom
   5. spreed
   6. zoho
   7. adobe-acrobat
   8. ilinc
   9. Live Meeting
   10. omnovia
   11. nefsis
   12. e-lecta
   13. webconference
   14. wiggio
   15. gatherplace
   16. wiziq
   17. ivocalize
4. chat
   1. meebo
   2. zoho-chat
   3. campfirenow
   4. google wave
   5. donutchat
   6. Userplane
   7. Webcam Studio
   8. pidgin
   9. plupper
   10. voxli
   11. Eyeball
   12. webby
   13. tinychat