Information shapes urban spaces in ways that most people rarely stop to consider. From data-driven planning to grassroots activism to influencing the routes we walk, bike, and drive, new information technologies are helping city dwellers to leverage information in new ways. These technologies shape the uses and character of urban spaces. Information technologies and tools such as social media and GIS tracking applications are being used by individuals as they go about their daily lives, not as alternatives to social interaction, but as opportunities to participate in the shared experience of urban life. This edited volume focuses on the creative application and management of information technologies in urban environments, with an emphasis on the intersection between citizen participation in creating city environments and the policy-making that supports it. The chapters address critical issues including the digital divide, transportation planning, use of public spaces, community building, and local events. This book was originally published as a special issue of the Journal of Urban Technology.