Pidgin
Open Source
Pidgin is a free and open-source chat client which supports AIM, Google Talk, ICQ, XMPP protocols.
Trillian
Freemium
Trillian is a proprietary multiprotocol instant messaging application.
Miranda IM
Open Source
Miranda IM is an open source multiprotocol instant messaging application, designed for Microsoft Windows.
Facebook Messenger
Free
Facebook Messenger is the official Facebook app that lets you have text conversations with all of your friends on the popular social network.
Psi
Open Source
Psi is a free instant messaging application designed for the XMPP network (including Google Talk). Fast and lightweight, Psi is fully open-source and compatib…
Gajim
Open Source
Gajim is an instant messaging client for the XMPP protocol which uses the GTK+ toolkit.
Quassel IRC
Open Source
Quassel IRC, or Quassel, is a graphical, distributed, cross-platform IRC client.
Bitmessage
Open Source
Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another…
qutIM
Open Source
qutIM is free and open-source multiprotocol (ICQ, Jabber, Mail.Ru, IRC, VKontakte) instant messenger.
Psi+
Open Source
Psi is a cross-platform powerful XMPP/Jabber client (Qt, C++) designed for the Jabber power users. Psi+ is a development branch of Psi IM XMPP/Jabber client.
Kadu
Open Source
Kadu is a free and open source multi-platform instant messaging client that supports Gadu-Gadu, XMPP IM networks and other services based on XMPP like Google …
Coccinella
Open Source
Coccinella is a free and open-source cross-platform client for the XMPP/Jabber-instant messaging-protocol.
Tox
Open Source
Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.
Digsby
Open Source
Digsby provides you with IM, email and Social networks in one easy to use application.
Imo
Free
Imo free video calls and chat is a kind of Communication apps for Android.
HexChat
Open Source
HexChat is an open-source, cross-platform IRC client.
ICQ
Free
ICQ is an open source instant messaging software.
Miranda NG
Open Source
Miranda NG is a successor of Miranda IM, a popular multi-protocol instant messaging client for Windows.
Instantbird
Open Source
Instantbird is a cross-platform instant messaging client based on Mozillas XULRunner and the open source library libpurple used in Pidgin.
Spark
Open Source
Apache Spark is an open-source cluster-computing framework.
KakaoTalk
Freemium
KakaoTalk (Korean: 카카오톡), or sometimes KaTalk, is a free mobile instant messaging application for smartphones with free text and free call features.
Tencent QQ
Free
Tencent QQ (QQ) is an instant messaging software service.
Bit Chat
Open Source
Bit Chat is a secure, peer-to-peer, open source instant messenger with end-to-end encryption.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
Compare Adium with alternatives
Compare Facebook Messenger and Adium and decide which is most suitable for you.