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.
Due to C portability, OpenOffice.org's usual middleware, Universal Network Objects (UNO), could not be designed object oriented. With NOA-libre you can still access UNO, but also the NOA-libre object oriented layer atop UNO. Being based on UNO, NOA-libre is network aware, meaning that you can use it to have your local office installation execute some commands, or an OpenOffice.org installation anywhere on the world, provided you have a appropriate network connection and privileges. With NOA-libre, you can: embed OpenOffice.org windows in your Java applications or applets; remote control OpenOffice.org windows on your desktop, over the network, or "headless", i.e. only functional without visible output; and/or extend OpenOffice.org by writing Java plugins. NOA-libre is compatible with OpenOffice.org and LibreOffice, easier to deploy than the usual UNO-only Java applications, and allows you to interact with various OpenOffice.org components (but is by far most commonly used with Writer and Calc).