The Log & Dbug Library is an open source PL/SQL library, useful to log/debug your programs in the development phase and trace their activity and performances in production. It is ideal to improve your efficiency and code quality.
Elvyx is a tool designed to monitor and profile the jdbc activity on java projects. This jdbc profiler has a server with a built-in db and a client to improve the experience.
XPHP is an IDE authoring tool for Windows that allows you to design, develop, test, debug and deploy PHP applications. [This project has been discontinued since 2005]