Tech Stack

1. UI: 

a) JQuery/JQuery UI

b) Apache Tiles

c) JSTL

d) Flex

e) Spring MVC

2. Dependency Injection:

a) Spring

3. Transaction management:

a) Spring

4. Rule engine:

a) OpenRule/Drools

5. Database:

a) Oracle

b) Neo4j

c) H2

6. Reporting:

a) JasperReport

b) POI

7. Build:

a) Maven

b) Ant

c) Hudson

d) SVN

8. Testing:

a) UI: findBugs, YSlow

b) Unit test: JUnit, DBUnit

9. Knowledge Repository

a) Sharepoint

10. Issue Tracker:

a) Jira

11. Application server:

a) Weblogic

b) Tomcat

12. BPM:

a) JBPM/Activiti

13. ORM:

a) JPA via Hibernate

14. Security:

a) Spring Security

15. Rapid developement tools:

a) Appfuse

b) SpringSide

c) Spring Roo

16. Schedule:

1) Spring Batch

2) Quartz