Table of Contents
www.quora.com/Data/Where-can-I-find-large-datasets-open-to-the-public -- very good collection of links
Amazon provides following data sets : ENSEMBL Annotated Gnome data, US Census data, UniGene, Freebase dump
Data transfer is 'free' within Amazon eco system (within the same zone)
InfoChimps has data marketplace with a wide variety of data sets.
open source data portal platform
Crowd sourced flight data http://openflights.org/
OpenStreetMap is a free worldwide map, created by people users. The geo and map data is available for download.
Available from http://libremap.org/