
Spark is an Open Source, cross-platform IM client optimized for businesses and organizations.

Internal IM Server for Enterprises
Smack is an Open Source XMPP client library for instant messaging and presence. A pure Java library, it can be embedded into your applications to create anything from a full XMPP client to simple XMPP integrations such as sending notification messages and presence-enabling device


Ignite Realtime is an open-source community dedicated to providing real-time collaboration solutions built on the XMPP protocol (formerly known as Jabber). They offer a variety of software projects including Openfire, Spark, and Smack, focusing on delivering enterprise-grade, scalable applications to enhance communication within and across organizations. Openfire is an acclaimed, easy-to-set-up and administer server designed for XMPP messaging, while Spark is a cross-platform instant messaging client optimized for businesses. Smack, on the other hand, is a widely-used library for Java designed to build XMPP client applications.The community at Ignite Realtime contributes to ongoing development and support for these projects, enhancing the robustness of communication technologies that suit both small teams and large enterprises. Their website, https://www.igniterealtime.org, serves as a central hub for project information, documentation, community forums, and download links, offering a comprehensive resource for anyone looking to implement real-time messaging capabilities in their software solutions.