Apache Commons Validator provides the building blocks for both client-side and server-side data validation.

GORM - Grails Data Access Framework

Spring Context provides access to configured objects like a registry (a context). It inherits its features from Spring ...

Jakarta/Apache commons logging 1.2 implemented over SLF4J

Spring Beans provides the configuration framework and basic functionality to instantiate, configure, and assemble java ...

Basic building block for Spring that in conjunction with Spring Beans provides dependency injection and IoC features.