software products were initially offered under the "iPlanet" brand; once the Sun-Netscape alliance ended, they were re-branded as "Sun ONE" (Sun Open Network Environment), and then the "Sun Java System". Sun's middleware product was branded as the Java Enterprise System (or JES), and marketed for web and application serving, communication, calendaring, directory, identity management and service-oriented architecture. Sun's Open ESB and other software suites were available free of charge on systems running Solaris, Red Hat Enterprise Linux, HP-UX, and Windows, with support available optionally. Sun developed data center management software products, which included the Solaris Cluster high availability software, and a grid management package called Sun Grid Engine and firewall software such as SunScreen. For Network Equipment Providers and telecommunications customers, Sun developed the Sun Netra High-Availability Suite. Sun produced compilers and development tools under the Sun Studio brand, for building and developing Solaris and Linux applications. Sun entered the software as a service (SaaS) market with zembly, a social cloud-based computing platform and Project Kenai, an open-source project hosting service. Storage Sun sold its own storage systems to complement its system offerings; it has also made several storage-related acquisitions. On June 2, 2005, Sun announced it would purchase Storage Technology Corporation (StorageTek) for US$4.1 billion in cash, or $37.00 per share, a deal completed in August 2005. In 2006, Sun introduced the Sun StorageTek 5800 System, the first application-aware programmable storage solution. In 2008, Sun contributed the source code of the StorageTek 5800 System under the BSD license. Sun announced the Sun Open Storage platform in 2008 built with open source technologies. In late 2008 Sun announced the Sun Storage 7000 Unified Storage systems (codenamed Amber Road). Transparent placement of data in the systems' solid-state drives (SSD) and conventional hard drives was managed by ZFS to take advantage of the speed of SSDs and the economy of conventional hard disks. Other storage products included Sun Fire X4500 storage server and SAM-QFS filesystem and storage management software. High-performance computing Sun marketed the Sun Constellation System for high-performance computing (HPC). Even before the introduction of the Sun Constellation System in 2007, Sun's products were in use in many of the TOP500 systems and supercomputing centers: Lustre was used by seven of the top 10 supercomputers in 2008, as well as other industries that need high-performance storage: six major oil companies (including BP, Shell, and ExxonMobil), chip-design (including Synopsys and Sony), and