A 2D scientific plotting package for Python, geared toward the production of publication-quality plots. [Open Source, GPL]

Python support for GD graphics library. [Open Source, BSD-like]

A Python interface to the gnuplot plotting program. [Open Source, GPL]

An object oriented programming interface to synthetic rendering, which provides a common environment and description language to treat light distribution in three dimensional spaces. Also provides a Python API to the renderer. Free for non-commercial use.

2D plotting library which produces publication quality figures in a variety of hardcopy formats and interactive environments across platforms. Matplotlib can be used in python scripts, the python and ipython shell (ala MATLAB, or Mathematica), web application servers, and six graphical user interface toolkits.

A free, easy to use scientific data visualizer. [Open Source, GPL]

The binding layer between Python and OpenGL. [Open Source, BSD-like]

Modules for creating 3D computer graphics images, focusing on Pixar's RenderMan interface. [Open Source, BSD-like]

Provides an interface to the Microsoft Windows TWAIN sub-system. [Open Source, GPL]

A Win32 Python Extension for Accessing Video Devices (e.g. a USB WebCam, a TV-Card, ...) [Open-Source, LGPL]

A free, open-source module for producing real-time 3D scenes with Python. Includes a modified version of IDLE. [Open Source, BSD-like]