Emsoft-data is an open source data utils library for Java 1.6+. Contains data manager for unified work with any data, base generic domain classes with id, name, description properties, exceptions utility and other.
This is a small tool to allow java developers to test different sql queries on database. With the abilities run different sqls with different variable bindings for some times, especially binding a list to in clause parameter. DBAs have their powerful sqlpus tools. But they are not run same as the java developers do. This tool can output the execution times, and/or output the results. This will help java developers on tuning the sql performance.
Domain Object Explorer is a desktop application that auto-generates the user interface for your JPA / EJB3 entity beans.
The Dynamic Code Evolution Virtual Machine (DCE VM) is a modification of the Java HotSpot(TM) VM that allows unlimited redefinition of loaded classes at runtime. The current hotswapping mechanism of the HotSpot(TM) VM allows only changing method bodies. Our enhanced VM allows adding and removing fields and methods as well as changes to the super types of a class.
jLogMan displays the current state of java.util.logging's Loggers and Handlers in an "Outline" (a tree table widget). With it you can create new Loggers and Handlers and change logging levels. There are Actions to save/restore logging configurations to/from files and an option to apply the configuration at startup. It can be dropped into any swing app (tested with jre 1.6 and 1.7); there is a NetBeans plugin. See the wiki for details and docs.