PetersonGIS has always been interested in map data visualization techniques and avant-garde design, especially as these techniques further our customer's understanding of their data and further their message to their own customers. We've made hundreds of maps and written a few textbooks on cartography that are used in university classrooms around the world.
Map design tools are in a constant state of flux and continual improvement by many organizations and vendors. We keep our eye on the latest developments in the spatial field to make sure your needs are met to the fullest. Tools we're loving: PostGIS, GeoServer, OpenLayers, QGIS, ArcMap, Inkscape, D3.js, GeoGig, CartoCSS, SLD, python, and Imposm3.