The Sun Java Communications Suite is a communications and collaboration solution. It delivers email, calendaring, and real-time collaboration functionality for service providers and large organizations worldwide. It provides an extensible, standards-based development platform, with a focus on performance, reliability, and scalability. The latest release is version 6 update 2, which is now available for download.

Sun Java Enterprise System (ES) delivers an integrated enterprise services software system that is designed, developed, and tested to provide a consistent experience to IT and business users. Java ES 6 is the latest release, offering more products, compatibility testing, and interoperability testing than Java ES 5. It also employs the installers of its constituent products instead of a single-host installer for more flexibility in setting up enterprise-level deployments.

There is now a media kit for Sun Java Mobile Communication 1.0 that will enable users of leading edge phones to synchronize in real time over-the-air with calendar and contact data stored on Sun Communication Suite servers. This solution expands Sun's client spectrum from desktop and webtop to mobile devices. SyncML devices can be configured to accept push updates, and users can manually "pull" the updates from the server as well as send local changes back to the servers.