Import/export/parse application settings in a versatile manner
Open Source License Management for Closed Source Software.
TableLayout is a powerful layout manager
OSS/J Presentation & Reporting
HA-JDBC is a JDBC driver proxy that provides light-weight, transparent clustering capability to any underlying JDBC driver.
QuickServer is an open source Java library/framework for quick creation of robust and multi-threaded, multi-client TCP server applications.
With QuickServer one can just concentrate on just the application logic/protocol on hand.