NYC Open Data
NYC open data repository, distributing geospatial and tabular data. Download links to datasets are available by clicking on the red About button on the far right of the data view and scrolling down to the Attachments section.
Florida Geographic Data Library
Clearinghouse for over 400 geospatial datasets pertaining to the state of Florida from local, state, federal and private agencies.
Prince Edward Island GIS Data Catalogue
Includes historical forestry data going back to 1900 and historical air photos going back to 1935 (cost). Property boundaries and assessment information are at a cost.
Burlington GIS Dataset and Air Photos
Polylines and Elevation points. Polylines are all in one layer and encompass building outlines, streets, curbs, etc. arenas, tennis courts, vacant lands, ward