Graphical User Interface for Gromacs
mujoco-py allows using MuJoCo from Python 3
OpenNum lets you distribute solvers with a nice graphical interface
Real-time interactive 3D graphics API for scientific simulations
A framework for simulating open quantum dynamics
Simulated Airline Travel Solution Provider Library
A Library for Interactive Modelling and Visualisation
SaaS for running simulation models in the cloud
The open source Algorithmic Trading System