M/Monit - Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.

Statista - The Statistics Portal for Market Data, Market Research and Market Studies

Zabbix - Track, record, alert and visualize performance and availability of IT resources

Montecarlito - MonteCarlito is a free Excel-add-in to do Monte-Carlo-simulations.

Nagios - Complete monitoring and alerting for servers, switches, applications, and services

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.