Geographic Information Systems (GIS) are technological tools to depict spatial information visually and to conduct spatial analysis. GIS technology has been evolving, and has developed into various forms—first desktop, then web, then web 2.0. This article talks about citizen-oriented services for GIS applications, and specifically: Citizen-oriented transit information, citizen relationship management (CiRM), citizen-volunteered geographical information (VGI), and citizen participation in planning and decision making. The article then goes on to discuss future trends in transparency, citizen engagement, and participation.