Empathy is an instant messaging (IM) and voice over IP (VoIP) client which supports text, voice, video, file transfers, and inter-application communication over various IM protocols. Developed by The GNOME Project
License: Open Source
Gajim is a more feature-rich and customizable XMPP client, ideal for power users who need advanced functionalities, whereas Empathy is a simpler and more user-friendly application that integrates well with the GNOME desktop environment, making it suitable for casual users.