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

• Group Chat
• In-line Spell Checking
• Strong Message Encryption
• Tabbed Conversations
• File Transfer
• Screen Capture Sharing

Combined with the Openfire server, Spark is the easiest and best alternative to using un-secure public IM networks.

Spark - an Ignite Realtime community project.

Ignite Realtime is an Open Source community composed of end-users and developers around the world who are interested in applying innovative, open-standards-based Real Time Collaboration to their businesses and organizations. We're aimed at disrupting proprietary, non-open standards-based systems and invite you to participate in what's already one of the biggest and most active Open Source communities.