Similar to Adium

AMSN

Coccinella (software)

CrossOver (software)

Element (software)

File System Visualizer

FreeCAD

GNU Emacs

Godot (game engine)

ImageJ

JEdit

Kopete

AIM (software)

ICQ

Windows Live Messenger#Microsoft Messenger for Mac

Mumble (software)

Skype for Business

Telegram (software)

Yahoo Messenger

Zimbra

Discord