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Of all the web apps that have discussed above, Random Dorm is the one that could have a positive purpose.
It could connect great minds leading to awesome innovations (highly unlikely) or at the very least it could help students to hook up across campuses.
Being in the same domain, they have launched Tinychat Next which works the same way as Chatroulette.
The user interface is a bit more refined and you need to have flash installed to even see how the UI looks like.
The web app itself is pretty bare-bones, with two video panes showing the user & you, a huge pane for text chat and a couple of buttons for controlling the chat.
AZAR - Random Video Chat is exactly what its name suggests it is: an app that lets you have random video conversations with other users.
In other words, it's a sort of hybrid between Badoo and Chatroulette.
anybodyoutthere is a random chat service with an awesome UI and concept.
You can ask a question or share a thought and you will be shown a list of people with similar interests to talk to.