Kawa
Kawa is a Scheme environment, written in Java, and that compiles Scheme code into Java byte-codes. Kawa is a full Scheme implementation. It implements almost all of R5RS, plus some extensions.
Kawa provides a framework for implementing other progressing languages, and comes with incomplete support for CommonLisp, Emacs Lisp, and EcmaScript, and the draft XML Query language.
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License
GNU General Public License (GPL)