Mibbit is described as 'No Java, no flash. With Mibbit, chatting online is easy, just choose your nickname and press go! No sign-up is required and you can use it from wherever you are with just a web browser' and is an website in the social & communications category. There are more than 25 alternatives to Mibbit, not only websites but also apps for a variety of platforms, including Linux, Windows, Mac and Self-Hosted apps. The best Mibbit alternative is Thunderbird, which is both free and Open Source. Other great sites and apps similar to Mibbit are SeaMonkey, HexChat, mIRC and irssi.
CGI:IRC is a Perl/CGI program that lets you access IRC from a web browser, it is designed to be flexible and has many uses such as an IRC gateway for an IRC network, a chat-room for a website or to access IRC when stuck behind a restrictive firewall.
WebIRC runs as a server and is always connected to your favorite IRC networks. Seamlessly open the same session from home, work, and your mobile devices to continue exactly where you left off.
jakeIRC is a web-based Meteor IRC client that allows users to connect to their favorite IRC channels.
Gnotty ties the knot between the web and IRC. It is designed to assist open source projects that host an IRC channel for collaboration on their project. Gnotty is BSD licensed.
lightIRC is a fast, free, Flash-based IRC Client. It supports webcams with an extension! Embed it into your website with a couple of clicks!
The sushi IRC suite consists of a central daemon and several clients, which communicate via DBus.
IceChat is a fully featured, simple to use IRC Client allowing you to chat online with your friends and for meeting new people as well. It can be used in Windows 95/98/ME/2000/XP/2003/Vista and also Windows...
MegaIRC is an Internet Relay Chat (IRC) Client. It allows you to connect to the IRC network a virtual meeting place where people from all over the world can meet and talk.
XChat is an IRC chat program for both Linux (Open Source) and Windows (Shareware, 30-day trial). It allows you to join multiple IRC channels (chat rooms) at the same time, talk publicly, private one-on-one conversations etc. Even file transfers are possible.
wsIrc - the global community communicator, goal is to offer a free web IRC client which should be at the end as good as old standalone application, but yet without requiring any installation, without any update, without any virus risk, and maybe we will offer yet a few...
HoloIRC is an open source IRC client for Android 4.0 and up. It is designed to be as simple to use as possible while being extremely small in size and fairly light in resources. It works with IRC bouncers as well as regular servers.
HoloIRC is the most popular Android Tablet alternative to Mibbit.
Atomic is an open source IRC client built for a new age. New features from its heritage of Yaaic, improvements and stuff.
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