Some datasets and REST endpoints to help you
- St Louis Federal Reserve – http://research.stlouisfed.org/fred2/
- Socrata Catalog for St Louis region – https://communities.socrata.com/catalog/rhok-st-louis
- St Louis County on Github (geojson) – https://github.com/stlouisco/stlouisco-gis
- St Louis County ArcGIS Server services – http://maps.stlouisco.com/arcgis/rest/services
- St Louis County Experimental ArcGIS Server services – http://maptest.stlouisco.com/arcgis/rest/services
- St Louis City Open Data portal – https://stlouis-mo.gov/data/
- Metro Routes and Stops (3/10/2014) – https://drive.google.com/file/d/0B3ao8BvgFQo9WU5iOG9PaTdBWEk/edit?usp=sharing
Find more on the Open Data STL Wiki (http://www.opendatastl.org) or even add new data sources to the wiki!