JASP - JASP, a low fat alternative to SPSS, a delicious alternative to R.
Montecarlito - MonteCarlito is a free Excel-add-in to do Monte-Carlo-simulations.
RStudio - RStudio™ is a new integrated development environment (IDE) for R.
Statista - The Statistics Portal for Market Data, Market Research and Market Studies
IBM ILOG CPLEX Optimization Studio - IBM ILOG CPLEX Optimization Studio is an easy-to-use, affordable data analytics solution for businesses of all sizes who want to optimize their operations.
PSPP - PSPP is a free software application for analysis of sampled data.