OpenStreetMap

A partnership between the NYC Department of Information Technology and Telecommunications (DoITT) and OpenStreetMap is a promising example of the public sector and tech communities working together to improve the accuracy and usability of data sets.
Oct 6, 2013   MapBox
Google starts charging for its maps, and an open source alternative -- with support from Microsoft -- begins to challenge Google's dominance.
Dec 29, 2011   MIT Technology Review