This site hosts the source code for C++ version of the Broker for SBW, NOM module, advanced simulation suite, analysis applications and model editors.
Open source development for FluidEarth (https://fluidearth.net/default.aspx) which supports the OpenMI Standard (http://openmi.sourceforge.net) Here are OpenMI Association approved applications.
Dodona is a molecular dynamics program which aims to treat nanostructures. It is provided with a basic interpretater language and can easily be extended with plugins. It supports basic matrix and vector manipulation in a Matlab/Octave-fashion way.