Web chat or Online Chat System is an opensource project developed using PHP and AJAX . We can implement this in our project such as Social Networking, Online Matrimonial site, etc. No data base is required for this even No flash file is required to this. User has a provision to send private message and he can create private room.
Web Chat
AJAX Chat is a fully customizable web chat implemented in JavaScript, PHP and MySQL which integrates nicely with common forum systems like phpBB, MyBB, PunBB, SMF and vBulletin. Its developed using latest PHP and AJAX technology. A Flash and Ruby based socket connection can be used to boost performance. Download this project and implement this as plugin. We got this project from source forge.