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Remotely hosted custom web based chatroom. You will have your own URL to the chat http://YOURSITE/chatroom.html You can edit the title of the page, and even add your own meta tags to the chat! Install is as simple as copying a few lines of code, placing it into an empty html file and saving it to your server.Web based HTML chat means, No fake bots to destroy your chatroom with Ads. All chatters are real people.
Price: Freeware

Add one of the best chat system on the net to your site completely FREE , No downloads required, just copy and paste.
Price: FREE

Geesee is free chat for your website or blog. You don't have to download or install anything, just put a few lines of code into your HTML code and you are done. Geesee allows visitors to your site to chat with a huge community of other users who are connected to Geesee from other sites. Geesee offers many chat rooms on different topics. Rooms can be searched by tags or easily created. User can join any chat room and start to chat right away without registration. You don't have to have many site visitors to have a functional chat on your website. Even if you have one visitor a day, he can be able to have fun chatting with others in Geesee network through Geesee on your site. Geesee is easy to use, user-friendly, native, transparent and stable. High-quality chat service will add value to your site and will make your visitors return for more fun.
Price: free

Private-Chat works for all web browsers without downloading any software. We install your chat room on a high-speed Web server, then email you the unique address, so no server space or work is required on your part. Create an secure online community with our Members-Chat format or moderate chat sessions with our Moderator-chat Add-on. Other Add-ons include password protection, message alert bell, private messages, and avatars. Select your chatroom's look and feel, we'll do the rest.
Price: Fee based