Galaxium
Galaxium is an instant messenger application designed for the GNOME desktop.
15 Alternatives To Galaxium
Adium
Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.
Centericq
Centericq is a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!
Conversations
XMPP client designed with ease of use and security in mind
Disa
Disa is your new messaging hub.
Facebook Messenger
Facebook Messenger is a faster way to message.
Gajim
Full featured and easy to use Jabber client
ICQ
ICQ is one of the oldest instant messengers.
Messenger for Desktop
A simple & beautiful app for Facebook Messenger.
Palringo
Palringo is a cross – platform instant messaging client with which you can communicate with your contacts from MSN, Gmail, Yahoo MSN, AOL, Jabber or ICQ at the same time.
Pidgin
Pidgin is an easy to use and free chat client used by millions. Connect to AIM, MSN, Yahoo, and more chat networks all at once.
Psi
Psi is a multi-platform and standards-based instant messaging client available for Windows, Linux, Mac and more.
Signal
Fast, simple & secure messaging. Privacy that fits in your pocket.
Telegram
Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
Trillian
Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
Xabber
Open source Jabber (XMPP) client with multi-account support, clean and simple interface.