Incanto is an open source project providing a set of Apache Ant tasks for accessing Oracle tools such as SQL*Plus and Data Pump Import/Export from Ant's XML build files.
LOG4PLSQL is a PLSQL framework for logging in all PLSQL code
this project was born from the log4J spirit (and use it). You have the possibility to log apart from transaction and use all LOG4J feature.
Jipes provides open source Java APIs deeply integrated into the Oracle RDBMS, including an Ant task for building and exporting database objects. A Java Data Cartridge replacing database links is also in process.