“The Fedora Development team  announced the release of Fedora 19 ‘Schrödinger’s Cat’

There are many new features in fedora 19 some of them are

• developer’s assistant
•  samples and toolchains for a different languages;
• OpenShift Origin, which allows easy building of Platform-as-a-Service infrastructure;
• node.js; Ruby 2.0.0; MariaDB
• and OpenLMI,  remote management of machines
• GNOME 3.8,
• KDE Plasma Workspace 4.10
• MATE Desktop 1.6.”

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see full changes and new features  : http://docs.fedoraproject.org/en-US/Fedora/19/html/Release_Notes/