Mta-turnstiles is a project mainly written in Python, it's free.
visualization/data exploration app for NYC MTA Turnstile data
This is an application designed to visualize the MTA turnstile data available at http://mta.info/developers/turnstile.html
To run, place a copy of tornado inside the top level directory http://www.tornadoweb.org/
see data.txt for steps to load data
For information on improving this application create a fork of it on github, or contact @jehiah
Copyright 2010 Jehiah Czebotar.
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/