Mapline (previously Topo.ly) is a free and paid online service for capturing and geocoding spatial data from spreadsheets and creating point, territory and heat maps. It is free for limited use (quite generous) and paid when you need to map significant (we are talking substantial) datasets. It's intuitive, easy to use and produces high quality interactive maps. Free service has only minimal map customization options and does not include the visual analysis that is included with the fee options.