JTcl is an implementation of Tcl written in Java. JTcl implements a large extent of Tcl 8.4 syntax and commands, limited only by API restrictions of the Java Virtual Machine. JTcl is based on the Jacl interpreter.
JTcl website: http://jtcl.kenai.com/
JTcl 2.0.0 alpha1 is released as of November 17, 2010.