Introduction

• Introduction to Spring Framework 2.5 (an article posted on TheServerSide.com)
• What's New in Spring 2.5 (detailed Spring 2.5 series posted on InfoQ)
• Spring 2.0: What's New and Why it Matters (detailed Spring 2.0 update article posted on InfoQ)
• Introducing the Spring Framework (an article posted on TheServerSide.com)

Spring Framework Reference and API

Current Releases

• Spring Framework 3.0.x (current release 3.0.0.M3)
  • Reference Manual ( HTML / PDF )
  • API (Javadoc)
  • Change Log

• Spring Framework 2.5 (current release 2.5.6)
  • Reference Manual ( HTML / PDF )
  • API (Javadoc)
  • Change Log

Previous Releases

• Spring Framework 2.0 (production version 2.0.8)
  • Reference Manual ( HTML / PDF )
  • API (Javadoc)
  • Change Log
  • Chinese translation of the reference manual (version 2.0.?; HTML)

• Spring Framework 1.2 (production version 1.2.9)
  • Reference Manual ( HTML / PDF )
  • API (Javadoc)
  • UML Diagrams (May be older 1.2.x version)
  • Change Log
  • Tag Library (Javadoc)
  • Korean translation of the reference manual (version 1.2.2; HTML / PDF)

• Spring Framework 1.1 (production version 1.1.5)
  • Reference Manual ( HTML / PDF )
  • API (Javadoc)
  • UML Diagrams (v1.1.4)
  • Tag Library (Javadoc)
  • Chinese translation of the reference manual

Spring Web Flow Reference and API
 

• Spring Web Flow 2.0 (current production version 2.0.7)
  • Reference Manual ( HTML / HTML-Single / PDF )
  • API (Javadoc)
  • Reference Application
  • Change Log

• Spring Web Flow 1.0 (production version 1.0.6)
  • Reference Manual ( HTML / PDF )
  • API (Javadoc)
  • Change Log
  • 1.0 Upgrade Guide
    

Spring Security Reference and API
 

• Current Releases

  • Spring Security 3.0.x (current release 3.0.0.M1)
    • Reference Manual (HTML | PDF)
    • API (Javadoc)
  • Spring Security 2.0.x (current release 2.0.4)
    • Reference Manual (HTML | PDF)
    • API (Javadoc)

Other Spring Project Documentation
 

• See the individual project sites for documentation on other Spring Projects.
   

Tutorials

• Developing a Spring MVC application step-by-step (revised for Spring 2.5).

Technical Articles

• See the Articles page

Books

• Books by Title
• Books by Date

Blogs

• Subscribe to the SpringSource Team Blog.

Presentations

• See the Presentations page

Wiki

• The Confluence Community Wiki holds a number of Spring-related pages.