SWEET is the main software development which I initiated in 2014. At the beginning it was just a toy to investigate global spectral methods on the plane. Later, it became the main research tool for myself and also collaborators to investigate PDEs on the plane. Step-by-step, additional functionality was added such as simulations on the sphere. This also led to several publications and maybe even more important to quite pretty videos.
Visualization of vorticity field of barotropic instability benchmark.