Bean Scripting Framework (BSF)
Bean Scripting Framework (BSF) is a set of Java classes which provides scripting language support within Java applications, and access to Java objects and methods from scripting languages. BSF allows one to write JSPs in languages other than Java while providing access to the Java class library.

BeanShell
BeanShell is a small, free, embeddable, Java source interpreter with object scripting language features, written in Java. BeanShell executes standard Java statements and expressions, in addition to obvious scripting commands and syntax. BeanShell supports scripted objects as simple method closures like those in Perl and JavaScript(tm).

Groovy
Groovy is an agile dynamic language for the Java 2 Platform that has many of the features that people like so much in languages like Python, Ruby and Smalltalk, making them available to Java developers using a Java-like syntax. Groovy is designed to help you get things done on the Java 2 Platform in a quick, concise and fun way — Groovy brings the power of a scripting language directly into the Java 2 Platform.

Jelly
Jelly is a tool for turning XML into executable code. So Jelly is a Java and XML based scripting and processing engine. Jelly can be used as a more flexible and powerful front end to Ant such as in the Maven project, as a testing framework such as JellyUnit , in an intergration or workflow system such as werkflow or as a page templating system inside engines like Cocoon .

JRuby
JRuby is a pure Java implementation of the Ruby interpreter, being developed by the JRuby team. JRuby is tightly integrated with Java to allow both to script any Java class and to embed the interpreter into any Java application.

Judoscript
Judo is a functional scripting language. It is a normal algorithmic/object-oriented programming and java scripting language, and also has a number of built-in domain support.

Jython
Jython is an implementation of the high-level, dynamic, object-oriented language Python written in 100% Pure Java, and seamlessly integrated with the Java platform. It thus allows you to run Python on any Java platform.

ObjectScript
ObjectScript is a general purpose object-oriented programming language. It is designed to be simple to learn, easy to use, yet still powerful, combining the convenience of an interactive interpreter with many of the features of Java.

Pnuts
Pnuts is a script language for Java environment. It enables interaction with Java environment, simple Web scripting, customization for Java programs, and so on.

Rhino
Rhino is an open-source implementation of JavaScript written entirely in Java. It is typically embedded into Java applications to provide scripting to end users.