An open source live chat is essentially and excellent complement to almost any website.  It always enables site visitors to communicate in real-time concerning the site’s subject, providing businesses an great advantage of understanding in real-time what their site visitors like or don’t like regarding their products or services.
Whether you are a website owner or a company holder, for both of you I’ve compiled 25 most useful chat widgets and chat client tools to use for your own website or just use some of them to communicate with your workers.

Google Talk chatback badge

A Google Talk chatback badge will let visitors to your web page chat with you. They’ll be able to chat with you whenever you’re signed in to Google Talk as multyshades@gmail.com..

Yahoo Messenger Pingbox

Chat privately with visitors on your social network profiles, blog, or website through Yahoo! Messenger..

Rumbletalk

RumbleTalk provides a live customizable chat widget that can be added to any web page..

Plugoo

Let your website visitors chat with you while you’re online in your messenger..

Meebome

Meebo me is designed for anyone with a home on the web. If you’ve got a web page where you’d like to communicate with your visitors, meebo me allows you to see the people who are visiting your web page and chat with them!

Tokbox

Weave face-to-face communication into your site with our flexible API or a simple, plug-n-play app..

Shoutmix

Add live chat capabilities to your website today. Get instant feedback and great user interaction with our shoutbox chat widget..

Mibbit

If you’d like to have webchat on your own website, you could use a Java applet that requires a 3rd-party download or you could use Mibbit, which requires no special download at all!

Digsby

Manage all your existing IM, email, and social network accounts from one easy to use application..

AJAX Chat

AJAX Chat is a free and fully customizable open source web chat software implemented in JavaScript, PHP and MySQL. Sound support is implemented using Flash, Socket support using Flash on client-side and Ruby on server-side.

PHP Free Chat

phpFreeChat is a free, simple to install, fast, customizable and multi languages chat that uses a simple filesystem for message and nickname storage.

Woopra

Live Chat Support Initiate chat with your visitors Respond to their chat requests.

Cbox

Get a Cbox and add a new dimension of interaction to your website or blog. Cbox is a unique chat and messaging application that brings the best features of traditional chat and tagging systems to the social web. And the best part – Cbox Basic is completely free.

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Pidgin

Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.

Mibew Messenger

Mibew Messenger (also known as Open Web Messenger) is an open-source live support application written in PHP and MySQL. It enables one-on-one chat assistance in real-time directly from your website.

Banckle Live Chat

Banckle Live Chat is a next-generation web-based application that brings a social and collaborative touch to your live customer support. It enables you to track and monitor your website visitors effectively, enlightens you with comprehensive and detailed analytical reports and empowers you to manage all your live support activities with maximum efficiency.

WIMZI

Get an AIM WIMZI widget for your social networking pages, website or blog, and let others chat with you when you’re online with AIM. Your AIM Name stays private, and AIM WIMZI also lets you use your AIM Buddy List ® window to see how many people are visiting your profile or website!

Chatango

Add free live chat to any web page..

Zoho Chat

Get your clients to chat with your support representatives live. Resolve their issues instantaneously..

KoolIM

KoolIM.com is a web messenger application that allows you to stay connected with your favorite Instant Messenger almost anywhere. You need a computer with just a browser only. There is no need to download and install any software or Java plug-ins into your computer to use KoolIM.com Web Instant Messenger. KoolIM.com provides friendly, light and very easy to use web-based interface with almost all core features from the original Instant Messenger.

eBuddy

eBuddy is your online messenger for MSN, Yahoo, Gtalk, Facebook, ICQ, MySpace and AIM (AOL). Whether you’re at home, school, work or traveling; with eBuddy you can chat online everywhere anytime. eBuddy is available as a web based and mobile version. eBuddy provides instant messaging on every computer, it even works when you are behind a firewall! eBuddy means no downloads, no installation of software or upgrades and no registration. Best of all it’s free .. enjoy

Ftalk

The only way to chat with all your friends right from your desktop..

EZIM

EZIM is a messenger for internal communication. It does not need a server to authenticate against to sign in. As long as you can get an IP address from the DHCP server (i.e. the network supports multicast), it will be able to find all other users within the same network segment and communicate with them. It is very handy to use on local area networks as it allows admins to provide a simple messenger service to the members without the need to add more servers, making life alot easier.

Office Notes

Office Notes is a FREE application for taking and delivering in-office messages. It works within a local area network and it’s easy to setup and use.

Officesip

SIP, the session initiation protocol, is an open protocol for VoIP and other text and multimedia sessions, like instant messaging, voice, video and other services..

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