Biggles
A 2D scientific plotting package for Python, geared toward the production of publication-quality plots. [Open Source, GPL]
url: sourceforge.net/projects/biggles/
gdmodule
Python support for GD graphics library. [Open Source, BSD-like]
url: newcenturycomputers.net/projects/gdmodule.html
Gnuplot.py
A Python interface to the gnuplot plotting program. [Open Source, GPL]
url: gnuplot-py.sourceforge.net/
gracePlot.py
This module provides interactive 2-D plotting capabilities via the Grace package. [Open Source, Python license]
url: www.idyll.org/~n8gray/code/
JpGraph
An object-oriented presentation graphics library. [Open Source, GPL]
url: metagram.webreply.com/
Lightflow Rendering Interface
The Lightflow Rendering Interface is 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.
url: www.lightflowtech.com/
The MayaVi Data Visualizer
A free, easy to use scientific data visualizer. [Open Source, GPL]
url: mayavi.sourceforge.net/
Ming
A C library for generating SWF ("Flash") format movies. Ming includes a Python wrapper for the library. [Open Source, LGPL]
url: ming.sourceforge.net/
pyGDChart
A Python interface to the GDChart chart creation library. [Open Source, BSD-like]
url: www.nullcube.com/software/pygdchart.html
PyInventor
A Python wrapper for SGI's OpenInventor library.
url: www.cs.uit.no/~olemb/software/pyinventor/
PyOpenGL
The binding layer between Python and OpenGL. [Open Source, BSD-like]
url: pyopengl.sourceforge.net/
Python Computer Graphics Kit
Modules for creating 3D computer graphics images, focusing on Pixar's RenderMan interface. [Open Source, BSD-like]
url: cgkit.sourceforge.net/
Python TWAIN Module
Provides an interface to the Microsoft Windows TWAIN sub-system. [Open Source, GPL]
url: twainmodule.sourceforge.net/
PythonMagick
Makes it possible to access ImageMagick from Python. [Open Source, BSD-like]
url: pythonmagick.procoders.net/
PythonWare Image Library (PIL)
Provides image processing functionality and supports many file formats. [Open Source, BSD-like]
url: www.pythonware.com/products/pil/index.htm
VideoCapture
A Win32 Python Extension for Accessing Video Devices (e.g. a USB WebCam, a TV-Card, ...) [Open-Source, LGPL]
url: videocapture.sourceforge.net/
VPython
A free, open-source module for producing real-time 3D scenes with Python. Includes a modified version of IDLE. [Open Source, BSD-like]
url: www.vpython.org/