KVIrc

KVIrc is a feature-rich IRC client designed for ultimate portability. Carry your chat environment on a USB memory stick and plug into any computer to instantly connect with friends and communities. It comes packed with a powerful scripting engine, extensive theme support, and a highly customizable interface. Enjoy advanced tools like a built-in IRC server, encrypted connections, and a graphical text effects editor, making it a complete, professional-grade chat solution that travels with you.