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Grouptivity

Grouptivity. Social discussions, private discussions via the toolbar.

Chat - Linkbuilder

Chat - Linkbuilder. Pretty basic ... a quick and easy, no-plugin-required window where visitors to your site can talk to you or to each other. Each virtual "room" has a unique tag that you provide when building the link. If you use the same tag on two sites, you'll get the same room, which can be fun for creating "webring" rooms shared by a group of friends

Chatcreator.com

Chatcreator.com. Create your own chat box on a page on your site.

May We Help?

May We Help?. Resource that allows you to type in a URL and visit that page, and tag along a conversation box at the same time.

Chat with others visiting the same site

Yakalike - chat with others visiting the same site. Firefox or IE add on.

Swarm

Swarm shows you what websites people are visiting, right now.
Swarm is a graphical map of hundreds of websites, all connecting to each other.  It updates itself every second with where people are going and coming from.  As sites become more popular, they move towards the center of the swarm. 

itzle

itzle. A web gadget that allows you to walk around websites as if they were physical locations.

Webride - comment on webpages

Webride attaches discussion forums to each and every web page - on the fly.        

zpeech - comment on webpages

Link: zpeech This resource allows you to comment on particular webpages.

itzle

Link: itzle. Currently in closed beta. itzling a website allows you to converse with anyone else currently itzling the same location.