Services for user chat; some overlap with messaging.

1. 3bubbles : real-time chat for blogs (#,a-b)
2. ajchat : ajax based chat room (#,a-b)
3. Blogoscoped Chat : avatar based chat (#,a-b)
4. Campfire : business group chatting (c-d)
5. Chatsum : browser plugin to chat with others on the same site (c-d)
6. Conversate : instant online discussion spaces (c-d)
7. eMessenger : web-based messaging (e-f)
8. Gabbly : chat about any webpage (g-h)
9. Gtalkr : google talk anywhere messaging service (g-h)
10. iGlance : open-source messenger/remote client (i-j)
11. Itzle : chat about any webpage (i-j)
12. Jabphone : phone service using jabber system (i-j)
13. Jyve : skype networking and tools (i-j)
14. Kopete : kde instant messenger (k-l)
15. MyMe : personalize your blog, IM and skype profile (m-n)
16. peekko chat : firefox plugin for web page chatting (o-p)
17. Skype : peer-to-peer voice messaging (s-t)
18. Tello : instant web sharing (s-t)
19. Treehouse AJAX chat room : ajax chat room (s-t)
20. Userplane : social software for live messaging (flash) (u-v)
21. Web2Messenger : web to msn messnger service (w-x)
22. yakalike : firefox plugin for web page chatting (y-z)
23. Zoho Chat : group chatting service (y-z)