NoiseBox  

Noisebox is a powerful PHP shoutbox script that stores all its data in XML. Some of its features include: User friendly administration - 100% customisable through use of template skins - IP logging and blocking - password-protected usernames - Bad word filter - Emoticons - Choice of displaying via IFRAME or PHP include - No database required - uses XML files.

Hosting Requirements: Unix; PHP 4.1+
Price: Free

   Vchat Flash  

Flash and PHP based chat room, does not need to refresh the page to display the messages. No configuration required.

Price: Free

   Vchat Pro  

A fast php based chat room supports emoticons, auto refreshing system, bad words filter etc.

Price: Free

   Scribbler  

Scribbler is a extremely flexible commenting system that allows website owners to receive instant user comment/feedback from users. Features: Full custom template control - Language independence, templates have full control of the language including error messages - Tag-based template system - Entries are grouped and each group can be displayed independently - Can embed into other applications such as weblogs and image galleries - Can display multiple instances on the same page even without IFRAMES - Auto convert URLs in into links - Use COOKIES to save name/email/website fields - Flood protection - IP banning - Reserved usernames - Customizable list of allowed HTML tags - User self-delete of posts - Flush posts based on age, username, IP, and group - Multi-usered, allowing owner to share Scribbler with other site owners on a single installation - Can display from an off-server non-PHP website.

Price: Free (GPL)

   ClearChat  

ClearChat is a simple PHP/MySQL chat block with an HTML-interface. ClearChat is designed for use with PHP-Nuke 6.5 and uses the registered users data in its security system. It is only usable for registered users who are logged in. Users can undock the chat from the site itself so that it operates almost like you are talking to someone with MSN, ICQ etc. Also features smilies, autolinking of URLs, log, BB-code and a powerful admin area where you have full control over the chatters. Developed for and tested on PHP-Nuke 6.5 only!

Hosting Requirements: PHp-Nuke 6.5
Price: Free (GPL)

   TagHost  

TagHost allows you to run your own Tagboards hosting service very much like Tag-board.com. TagHost lets your tagboard owners configure all aspects of their tagboard's design and colors, as well as how their tagboard works. Extensive account pruning features will automatically clean out your database of unused posts and accounts, and pages can be configured to show advertising banners.

Hosting Requirements: Linux, Windows; PHP 4
Database: MySQL
Price: $49.95

   MASIRC  

MASIRC is a PHP based IRC client, it allows you to connect to any IRC channel on any IRC server on the internet with just a frames compatible browser!

Price: Free

   Magia Converse  

Magia Converse creates powerful, feature-rich chat rooms that can be accessed by HTML or Java based interfaces. Chat rooms are organized into conferences for additional organization, can have words filtered, and can be accessible by the general public or for a select audience only.

Price: ?

   PCIMCha  

PHP Chat Script. Features: Easy installation - No script editing needed - Chat icons -Very Fast Reload Time - A Seperate Message Archive to catch up on Older Posts. Up to 200 posts saved per Archive Page - 12 different chat colors + basic black - Non cluttered and seperated chat window - Auto Refresh and even a "Manual Refresh" for those who think that 15 seconds is too long to wait - Audible Sound Alert to let you know when there is a Refresh.

Hosting Requirements: Unix/Linux, Win NT
Price: Free

   Loud Shout  

A shoutbox made with flash shows messages without refreshing.

Price: Free