TheNextTrain.com
From Headway Wiki
theNextTrain.com is a mobile-friendly site that allows the user to specify two stops on a rail line and easily find out the next few trips between those stops. It was created by Jehiah Czebotar sometime in spring 2008, and uses GTFS data as a source of schedule information.
Jehiah has also created a series of iPhone applications covering individual agencies. As of September 11, 2008, they were each priced at $4.99, except for the BART and PATH versions, which were $3.99. On September 17, 2008, he added a JSON API to the site.
