Hello !
I released an online tool that allows for automatic planning of interplanetary trajectories with multiple gravity assists.
https://krafpy.github.io/KSP-MGA-Planner/
The tool provides an interactive 3D replica of KSP's solar system where you can zoom on planets and moons. It also provides a time selector to see the KSP's system configuration at a specific date.
The trajectory calculator works in two steps:
Generation of a planteray sequence : configure the orig