Gazebo versions 1.9.2 and 2.1.0 have been released.

Changelog | Migration Guide | Roadmap

Highlight for 1.9.2 (compatible with ROS)

• Enable and disable sky and clouds via SDF
• OS X improvements
• Numerous bug fixes

Highlight for 2.1.0 (latest version)

• Visualize moments of inertia
• Added ability to clear the world via a plugin
• Numerous bug fixes
• Improved test suite