No one would argue that maps are useful. However, creating even a simple interactive map ready to be published on the Web can be a real hassle. Fortunately, there is worldKit, a Flash-based light-weight geographical information system (GIS) distributed under GPL. Although it doesn’t provide all the bells and whistles of a professional application like GRASS GIS, it has a few clever tricks up its sleeve that allow you to create interactive maps without getting too deep into all the intricacies of GIS.