The Spring Framework is a layered Java/J2EE application framework led by Interface21. Among others it features a lightweight AOP container, transaction management, abstraction of JDBC and various OR mappers and a very complete MVC web framework.
Important links[]
How Tos[]
AOP[]
JDBC[]
LDAP[]
MVC[]
Security[]
How to configure ACEGI Security to use
Include any one of these into the base configuration.