ShoutPro  

ShoutPro™ is a highly customizable PHP shoutbox solution for your web sites. It is incredibly easy to install, doesn't require a database, and has a ton of features.

Hosting Requirements: PHP 4

   dotBotPHP  

An all in one AIM client written in PHP! Please note that prior PHP knowledge is recommended to use this script to its full extent. In more detail, dotBotPHP is an easy interface for PHP programmers to program and users to interact with bots. dotBotPHP is not a library, but merely an interface. Original expansion of the "engine" was leading towards a PHP library in the beginning but due to a little trouble, it went off in another direction.

Hosting Requirements: PHP 4.1+
Price: Free (GPL)

   X7 Chat  

Features: No Click" updates! - Unlimited Users, Rooms, and Messages - Full Administrator controls - IRC style commands - Ability to ignore and private message users - Ability to moderate chat rooms - Full user profiles for users to customize - Smilies - Full Message Formating and more

Hosting Requirements: Unix, Windows

   zChat  

zChat is a simple little chat script that everyone who visits your site is sure to love. It has auto-refresh every 10 seconds, and also remembers your name as long as you are in the chat. Also, the room name is easily customized. This new version even has a members online script, and you can change font color!

Hosting Requirements: PHP 4
Price: Free

   Andys Chat  

The new chat with a lot of features: Cool Win XP-Design - Smilies - Textcolours - Registration - Profiles with Profil-Manager - Avatarimage - Privat Messages - Password Protection - Login - Kick & Ban - IP-Block System - Admin-Log.

Hosting Requirements: Unix

   PHP ShoutBox  

PHP ShoutBox allows developers to add a instant message shout box to websites. The shoutbox is an iframe element, and the script operates using javascript and stores the messages in a MySQL database (a file gets complicated with synchronous posts, so a database was favored). The look of the box is controlled through styles. All the modern browsers are supported. PHP ShoutBox handles some of the details that other shout boxes do not. When the new message is displayed, the shoutbox is scrolled down so that the new message comes into view.

Database: MySQL
Price: Free

   IRCG: XML Real-Time Streaming  

IRCG is a revolutionary way for dispatching messages to huge groups of users over an arbitrary number of separate communication channels in real-time. IRCG provides message streams over persistent HTTP connections and can interface with a subsystem to produce static file snippets. All aspects of IRCG are scriptable using PHP. IRCG is format and content agnostic, and can produce any output format you require, including XML, XHTML/HTML, and WML.

Price: Free

   CJ Tag Board  

The CJ Tag Board is a quick and easy way of communicating with visitors to your website in real time. All you have to do is upload a few files, insert the code given into your webpage and you have yourself a tag board - the page with your tag board on it can have any extension (.html, .htm, .php, .shtml - you name it!).

Price: Free

   CreatiffLive  

Fast and simple interface for people chatting, which could be run on the most weak web-server and the lowest bandwidth. It do not use server's file system directly and works as fast as possible in session memory. It not use graphics; its basic idea is «easy talking». Features: settings of CSS output, colors for user's nicks and language of controls sets; settings of chat refresh rate, talk-time for chat, user exit delays; «in chat» bar; the words with '@' and 'http://' symbols are processing as links.

Price: Free

   MPM Chat  

Simple chat system with webcam support, registered nicks, banning, default and plain version etc.

Price: Free/$60