DARTS (Dynamics Algorithms for Real-Time Simulation) is a high-fidelity, flexible multibody dynamics simulator used for real-time hardware-in-the-loop design, integration and testing of spacecraft flight software. DARTS meets critical mission needs throughout the spacecraft design, test and verification and operations phases of missions. It allows the use of high-fidelity spacecraft dynamics models without sacrificing simulation speed enabling more reliable flight software design and testing, reduced development costs and reduced mission risks. DARTS is a multi-mission spacecraft simulator used by several flight project for their various simulation needs.

The DARTS simulator is based upon state-of-the-art computational algorithms from the Spatial Operator Algebra mathematical framework for multibody dynamics. The Spatial Operator Algebra is a mathematical approach for modeling the dynamical behavior of complex, articulated collections of bodies interacting with each other in free-space or in contact with the environment. The DSHELL spacecraft simulator uses DARTS as its multibody dynamics engine.

DARTS has also been adapted to develop the NEIMO software for the molecular dynamics simulation of large-scale molecular systems.