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Rakiura JFern - lightweight Petri Net framework. Engine with the GUI simulator, written in Java and designed for Java developers. Supports multiple inscription languages: Java, Kawa, BeanShell and Clojure.
A language designed for server-side WWW-based applications,
particularly database applications. It is based on Scheme, which makes the syntax extremely simple yet powerful. This implementation is a Java Servlet using the Kawa Scheme compiler.
JEmacs is a re-implementation of Emacs, written in a mix of Java, Scheme, and Emacs Lisp (ELisp). It uses Swing as the GUI toolkit, and Kawa to compile Scheme and ELisp to Java bytecodes.