Google Chrome, Firefox, and Thunderbird extension that lets you write email in Markdown and render it before sending.

Visualization of all roads within any city

Interactive viewing of spatial data in R

GUI interface for creating, editing, exporting of static GTFS data for a public transit authority

Web service to download customised OSM data in various file formats

Beautiful, interactive & open bike maps of Brazilian cities. Powered by OpenStreetMap.

Interactive tools for GTFS data visualization and analysis

Interactive visualization of all transit in the Transitland database

react-particle-image in R

using gravity models to understand foot traffic