GTFS Manager is the world's most used web application for maintaining GTFS data.

Transit Alerts publishes your service alerts in Google Maps using GTFS-realtime.

Show your riders the big picture in a zoomable map that updates with your GTFS.

Trillium builds rider-centric websites with responsive designs—for transit only.

Don’t get stranded! See how late transit runs in Google Maps.

Last week a new option was added for public transit directions in Google Maps. You can now choose the last possible trip for the day to get you where you want to go (probably home?). This is a convenient option to check before heading out for the evening, if, for example, you are trying to see if transit will be available when a concert ends. Now you’ll know.

This has been tested on Desktop and iOS version of Google Maps.