What is CartoDB?
CartoDB is a cloud-based mapping, analysis and visualization engine that lets users build spatial applications for both mobile and the web. CartoDB was launched in April 2012 and version 2.0 rolled out in November 2012.
The platform is already being used by major news organizations, research institutions, non-profits, and geospatial application developers throughout the world.
For web or print use, available in two designs (for light and dark background use) as well as vectorial and raster.
Use as you wish, but please be nice with it :-).
Kudos to @laszlito_k It has been a pleasure to work with him on this!