A complete X server implementation in Java which can run standalone or as an applet. It supports remote X and (using libjsch-java) X forwarded over SSH.

A User-Friendly visualization toolkit for machine learning: MLDemos. Extensible architecture, contains modules for classification (gaussian mixture models, kernel methods such as support vector machines, nearest neighbor, kernel PCA, boosting, multilayer perceptrons, linear classifiers), clustering (gaussian mixtures, kernel methods, k-means), regression, etc.

Pry is a powerful alternative to the standard IRB shell for Ruby. It is written from scratch to provide a number of advanced features, some of these include:

The SBMLToolbox provides a set of basic functions for reading, writing, manipulating, and simulating SBML (System Biology Meta Language) models. It is a free Open Source package on top of the libSBML with full compatibility to work with MATLAB and Octave alike and share models between the two systems.

NumaTOP is an observation tool for runtime memory locality characterization and analysis of processes and threads running on a NUMA system. It helps the user characterize the NUMA behavior of processes and threads and identify where the NUMA-related performance bottlenecks reside.