CHEBYTOP: Chebyshev (Polynomial) Trajectory Optimization Program

Copernicus: (Not an acronym) Generalized Spacecraft Trajectory Design and Optimization System

GALLOP: Gravity Assisted Low-thrust Local Optimization Program

MALTO: Mission Analysis Low-Thrust Optimization

Mystic: (Not an acronym)

NEWSEP: New (VARITOP-based) Solar Electric Propulsion Trajectory Optimization Program

OTIS: Optimal Trajectories by Implicit Simulation

QuickTOP: New (1990) QT2 Driver for the CHEBYTOP System (John Riehl)

RAPTOR: RAPid Trajectory Optimization Resource

Sail: VARITOP customized for Solar Sails

SEPSPOT: Solar Electric Geocentric Transfer w/ Attitude Constraints Program for Optimization of Trajectories

SEPTOP: (VARITOP-based) Solar Electric Propulsion Trajectory Optimization Program

SNAP: Simulated N-body Analysis Program

TIM: Technical Interchange Meeting

VARITOP: Variational Calculus Trajectory Optimization Program