Company Goldratt Research Labs created these great apps:
Harmony Strategy & Tactics System - Free version, Harmony - Strategy & Tactics Expert System, Goldratt's Dice Game tablet version, Goldratt's Dice Game phone version, Goldratt SIM Maintenance Depot, Goldratt SIM - Project Management, Goldratt SIM - Managing Flow, Goldratt SIM - Gas Station, Harmony Decision Maker, and others..