Cosmoscalibur, Edward Villegas' personal website (in Spanish).
Vero Recipes World, a recipes site by Verónica Orjuela.
MayaVi is a scientific data visualizer written in Python which uses VTK.
PyVista wraps VTK API in Python, making it simple to use.
ParaView is an open source multiple-platform application for interactive scientific visualization.
VisIt is an open source interactive parallel visualization and graphical analysis tool for viewing scientific data.