VPython

VPython is a powerful 3D graphics library specifically designed for Python programmers. Its user-friendly interface makes it easy for novice programmers to create scientific graphics programs quickly and efficiently. This package includes the following modules: the powerful Python programming language, the IDLE interactive development environment, the "Visual" module which provides real-time 3D output and is easy to use, as well as the "Numeric" module for speedy array processing.

What's even better is that VPython is completely free and open-source, which means it is accessible to everyone. With VPython, you can create stunning visualizations and simulations in real-time, helping you to understand complex topics with ease.

One of the best things about VPython is its constant improvements in new releases. In the latest version, a significant bug that was causing slow rendering of spheres was fixed. This means that users can now take advantage of VPython's full capabilities without slowdowns.

Overall, VPython is an excellent tool for scientifically-oriented programmers who want to create simple yet powerful 3D graphics programs. Its user-friendly interface coupled with its powerful modules make it a must-have for anyone looking to create impressive visualizations quickly and efficiently.