Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols. Developed by Pidgin
License: Open Source
Pidgin is an open-source, highly customizable messaging client that supports multiple protocols, making it ideal for users who prefer flexibility and control. In contrast, Disa offers a more streamlined, unified messaging experience, focusing on usability and integration across services, though it may lack some features for advanced users.