The Trick Simulation Environment is developed at the NASA Johnson Space Center. Trick’s flexible feature set enables users to build applications for all phases of space vehicle development including early vehicle design and performance evaluation, flight software development and testing, flight vehicle dynamic loads analysis, and virtual and hardware in the loop training. Trick’s purpose is to provide a common set of simulation capabilities allowing the domain experts to concentrate on their domain specific models, rather than simulation-specific functions like an job ordering, input file processing, or data recording.
The Installing Trick wiki page includes instructions to install Trick.
The full User's Guide is in the wiki pages.