Apache Ivy™ is a popular dependency manager focusing on flexibility and simplicity.

Mirah is a new way of looking at JVM languages. In attempting to build a replacement for Java, we have followed a few guiding principals:

No runtime library
Mirah does not impose any jar files upon you. YOU decide what your application’s dependencies should be.

Clean, simple syntax
We have borrowed heavily from Ruby, but added static typing and minor syntax changes to support the JVM’s type system. The result is pleasing to the eye, but as powerful as Java.

Metaprogramming and macros
Mirah supports various mechanisms for compile-time metaprogramming and macros. Much of the “open class” feel of dynamic languages is possible in Mirah.

No performance penalty
Because Mirah directly targets the JVM’s type system and JVM bytecode, it performs exactly as well as Java.

More about => MirahFeatures

Build scripts and packages for OpenJDK 7 and 8 under OS/X Snow and Lion

The Apache PDFBox™ library is an open source Java tool for working with PDF documents. This project allows creation of new PDF documents, manipulation of existing documents and the ability to extract content from documents. Apache PDFBox also includes several command line utilities. Apache PDFBox is published under the Apache License v2.0.

Apache Buildr is a build system for Java-based applications, including support for Scala, Groovy and a growing number of JVM languages and tools.

Javascript implementation of JVM