General Mission Analysis Tool
X-Ray and Neutron Reflectivity Modeling
Solves symbolic electrical AC circuit equations
Software for calibration of hyperelastic constitutive models
OpenNum lets you distribute solvers with a nice graphical interface
Real-time interactive 3D graphics API for scientific simulations
PySCeS Constraint Based Modelling
A tool able to simulate gene-environment and gene-gene interactions.
A Library for Interactive Modelling and Visualisation
ZEMAX extension for selective assembly