Trillian is a proprietary multiprotocol instant messaging application.

ChatSecure is a messaging application for iOS which allows OTR and OMEMO encryption for the XMPP protocol.

FastMail is an email service offering paid email accounts for individuals and organizations.

Conversations is an open source XMPP/Jabber client for the Android platform.

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Xabber (XMPP and Jabber) is a XMPP client for the Android Operating System.

WeeChat is a free and open-source Internet Relay Chat client, which is designed to be light and fast.