What is spring modules?

Spring Modules was a project that aimed to provide reusable, enterprise-level modules built on top of the Spring Framework. However, the project is now considered inactive and many of its modules have either been integrated directly into the Spring Framework or superseded by other libraries. Some notable modules included Spring Web Flow (for building web applications with guided navigation), Spring Security (originally Acegi Security), and Spring Batch. The concept was to offer pre-built solutions for common enterprise development challenges, thereby simplifying application development. While the project itself is no longer active, its legacy lives on through the incorporation of its best features into the core Spring ecosystem.