From Eclipsepedia

The unfortunately named "Eclipse Project" is the project dedicated to producing the Eclipse SDK. This name made sense back when there were only two or three projects at Eclipse, but now it is frequently referred to as the "Eclipse top-level project" to reduce confusion (or just "The Platform" when we're feeling grandiose). This project in turn is composed of four sub-projects: Equinox, Platform, Java development tools (JDT), and Plug-in Development Environment (PDE).

Sub-project pages

• Platform
• Equinox
• JDT
• Plug-in Development Environment (PDE)

Topic hubs

• Automated Testing
• Documentation
• Internationalization
• API Central
• Performance

Miscellaneous

• Version Numbering
• 3.3 Polish item list, (also see 3.2 list)
• 3.3 Performance pass
• Eclipse Project Committers
• Field Decorators and Validation