Vensim is simulation software for modelling the real world and  improving the performance of real systems. It offers classic system dynamics modelling along with flight simulators in a range of products from the free academic and personal use versions to professional products capable of modelling the most complex situations.

Vensim is available from http://vensim.com/

Vensim is primarily used for developing, analyzing, and packaging dynamic feedback models. We emphasize:

• High quality, with dimensional consistency and Reality Checks™
• Connections to data and sophisticated calibration methods
• Instant output with continuous simulation in SyntheSim
• Flexible model publication
• Model analysis, including optimization and Monte Carlo simulation

Vensim contains many industry-leading technical advances in simulation technology:

• Causal Tracing™
• Subscripting
• Optimization
• Venapp Flight Simulators (Learning Environments)
• Resource Allocation algorithms (ALLOC P)