What are some alternatives?
When comparing Pidgin and Trillian, you can also consider the following products
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Jitsi - Open-source video calling and chat platform.
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Facebook Messenger - Facebook Messenger is a faster way to message.
Adium - Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
irssi - Irssi is a terminal based IRC client for UNIX systems.