Real time web apps

Here are top ten real time web apps.
These are the ones which the developers needs to know.
http://www.netmagazine.com/features/top ... e-web-apps
Please reply if you have prior experience with any of these.
These are the ones which the developers needs to know.
http://www.netmagazine.com/features/top ... e-web-apps
Please reply if you have prior experience with any of these.