Developed by devhub.io
Have your own Slack like online chat, built with Meteor.
Robust, ubiquitous and massively scalable Jabber / XMPP Instant Messaging platform
Desktop chat client for Google Hangouts
ChatSecure is a free and open source encrypted chat client for iOS that supports OTR and OMEMO encryption over XMPP.
Conversations is an open source XMPP/Jabber client for the Android platform
Open-source XMPP client for Android
the first third-party instant messaging client for Google Hangouts
Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, AIM/ICQ, IRC and many other useful features.
Errbot is a chatbot, a daemon that connects to your favorite chat service and bring your tools and some fun into the conversation.
The extensible chat client.