ootk-core
Orbital Object Toolkit. A modern typed replacement for satellite.js including SGP4 propagation, TLE parsing, Sun and Moon calculations, and more.
orbpro
OrbPro is a CesiumJS distribution, a JavaScript library for creating 3D globes, 2D maps, and 4D physics-based space simulations in a web browser without a plugin.
ootk
Orbital Object Toolkit including Multiple Propagators, Initial Orbit Determination, and Maneuver Calculations.