AdiIRC is a free IRC (Internet Relay Chat) client with multiple servers and channels available and includes exchanging files.

In the portable version, AdiIRC will store all its settings in text files, allowing you to just put the adiIRC folder on a USB device or external hard drive giving you the option to take all your settings and servers with you.

With AdiIRC, you will be able to communicate with the users and share files with them. This ability is due to the DCC (Direct Client-to-Client) protocol support. You can also open multiple servers simultaneously (there are numerous servers to choose from, but you can also add your own if desired); they will be available in the tabs at the top of the app window. AdiIRC includes multiple configuration settings available, including alerts, themes, scripts, and more. There is also an auto-reconnect that attempts to reinstate your session when interrupted.

AdiIRC Features:

Threaded Multiserver

System Informations

DCC Chat/File Transfers

Fullscreen

Opacity and Transparency

Background Images

Full Message Logging

Easy Message Search

SSL/TLS/STARTTLS/IPV6 Connections

IRC logs browser/viewer

Advanced scripting

MTS Themes

Theme packs Icons fonts colors sounds emoticons scripts

Monitor Panels

Spellchecker

Adjustable nick column

Proxy support

Emoticons

Nicklist/Treebar/Windows icons

Advanced server list

SASL support

IRCv3 compatible

Inline images/Animated Gifs