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.
The release is a small maintenance release: most efforts were focussed on work happening on branches some of which has already been merged to trunk for 0.23.
The release notes can be viewed at http://common-lisp.net/project/armedbear/release-notes-0.22.shtml.
and the list of changes at http://trac.common-lisp.net/armedbear/browser/trunk/abcl/CHANGES.
Latest and older binary and source distributions can be downloaded from http://common-lisp.net/project/armedbear/releases/