jMATLAB

jMATLAB is an Eclispe based interpreter interface to linear algebra libraries. It is based on the notion of MATLAB. It provides MATLAB like scripting language for quick programming. It also provides ability to write toolboxes using java based plug-ins. Interface to GNUPLOT provides access to powerful plotting capabilities.

Above all, the extendable java architecture allows a power user to define a custom execution module. So if you wish, you can redefine how a mathematical operation is performed. You can choose to distribute a large matrix to a network of computers and benefit from additional computational power. Or use special purpose hardware to solve specialized problems.

Come for more information: http://www.jmatlab.org/