On behalf of the developers of ABCL (Armed Bear Common Lisp) I'm glad to be able to announce the 0.20.0 release. ABCL is a Common Lisp implementation implemented in Java and running on the JVM, featuring both an interpreter and a compiler. The compiler targets the JVM directly meaning that its output is runnable JVM bytecode. The fact that ABCL is written in Java allows for relatively easy embedding in larger applications. For integration with existing applications ABCL implements Java Specification Request (JSR) 223: Java scripting API. This release is the first to include a funded feature: funds were provided to implement the CLOS METACLASS feature and tests. Next to that, this release contains a large number of fixes and improvements, such as the ability to use JARs and URLs as pathnames and the a new ASDF version (ASDF2). You can find the full release notes at: http://common-lisp.net/project/armedbear/release-notes-0.20.shtml and the list of changes at: http://trac.common-lisp.net/armedbear/browser/trunk/abcl/CHANGES If you have questions regarding use or licensing, or you find issues, please report back to the development list: armedbear-devel at common-lisp dot net Source distribution archives can be downloaded in ZIP or gzipped tar form: http://common-lisp.net/project/armedbear/releases/abcl-src-0.20.0.tar.gz http://common-lisp.net/project/armedbear/releases/abcl-src-0.20.0.zip Signatures are available under: http://common-lisp.net/project/armedbear/releases/abcl-src-0.20.0.tar.gz.asc http://common-lisp.net/project/armedbear/releases/abcl-src-0.20.0.zip.asc In addition, binaries are also available: http://common-lisp.net/project/armedbear/releases/abcl-bin-0.20.0.tar.gz http://common-lisp.net/project/armedbear/releases/abcl-bin-0.20.0.zip With associated signatures: http://common-lisp.net/project/armedbear/releases/abcl-bin-0.20.0.tar.gz.asc http://common-lisp.net/project/armedbear/releases/abcl-bin-0.20.0.zip.asc