该版本的改进内容包括：
- Java Enterprise Edition 6
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- JavaServer Faces 2.0 for web interfaces and the ability to use EJBs in web applications
- Java Persistence JPA 2.0 and RESTful web services support
- Broader use of annotations instead of deployment descriptors
- Deployment, debugging and profiling with GlassFish v3
- JavaServer Faces 2.0 (Facelets)
- Code completion, error hints, namespace completion, documentation popups, and tag auto-import for Facelets
- Editor support for Facelets libraries, composite components, expression language
- JavaFX
- Support for JavaFX SDK 1.2.1
- Improved navigation, code completion, and hints
- PHP
- Full PHP 5.3 support
- Symfony Framework support
- Kenai.com: Connected Developer
- Full JIRA support
- Improved issue tracker integration
- Maven
- Improved support for Java EE 6, Groovy, Scala projects
- Customizable dependency exclusion in dependency graph
- Ruby
- Support for JRuby 1.3.1, Ruby 1.9 debugging, and RSpec 1.2.7
- Improved rename refactoring, type inference, and navigation
- C/C++
- Profiling: New tools for I/O Monitoring, Thread Analysis and Race Detection
- Faster synchronization during remote development
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