Swram-opengl is a project mainly written in Python, it's free.
OpenGL visualization for swarm simulations
Execute the script and supply the coordinates as floats in the form of one triplet per line via standard input. If a line contains the string 'done', the entities since the last done (or startup) are displayed on the screen.
The code is based on ksmt's example code, which can be downloaded from http://opengl20.blogspot.com/2008/05/writing-x-y-and-z-axis.html