Deep playground - Deep playground is an interactive visualization of neural networks, written in typescript using d3.

Neuroph - Neuroph is lightweight Java neural network framework to develop common neural network architectures.

Neuronify - An educational neural network app.

StatSim - StatSim is a free probabilistic simulation web app.

GoldSim - GoldSim is the premier Monte Carlo simulation software solution for dynamically modeling complex systems in business, engineering and science.

Spry Simulation - Microsoft Excel add-in which enables system dynamics, discrete-event and Monte Carlo simulation in modern spreadsheets, especially with small to medium-sized simulation models and for a proof-of-concept tasks.