BSF4ooRexx is a Java language binding for the scripting language ooRexx. It allows ooRexx programmers to directly use the Java Runtime Environment (JRE) libraries. It allows, for example, implementation of Java methods in ooRexx and callbacks from Java to ooRexx. It camouflages Java so that it resembles ooRexx by being dynamically typed and caseless. BSF4ooRexx comes with built-in support for programming OpenOffice.org/LibreOffice.org and allows ooRexx to be used as a macro language.