An all-in-one instant messaging app with lots of features.
Trillian can make VoIP calls, call landlines and cell phones, chat with groups, connect to multiple IM networks and video conference.
A Jabber instant messaging client for video, voice and text chat.
Gajim can make VoIP calls, text chat, chat with groups, connect to multiple IM networks and video conference.
Chat application and messenger which can voice chat, video chat and share files online that also integrates and functions as a client for other messaging...
Paltalk can make VoIP calls, text chat, join chat rooms, chat with groups, connect to multiple IM networks and video conference.
An all-in-one instant messaging client.
Pidgin can text chat, join chat rooms, connect to multiple IM networks and video conference.
Freeware multiprotocol IM client.
Digsby can text chat, connect to multiple IM networks, video conference and send SMS messages.