Maply is a fantastic tool for visualising our company data sets. The options it gives you even on its free tier are superb and we have had a lot of success with it so far.

It's so easy to use and customize. Provides easy basic features with the ability to add lots of flare and useful data. Heat map layers, concentration bubbles, and much more.

I like the ability that it has to create different styles of maps - you can create maps with or without labels and they have different styles/colors - silver, aubergine, retro. So you can use it to fit the type of presentation that you are doing, the look that you are going for, or your brand. You can zoom in and zoom out. You can also save all of your maps so that you aren't recreating them over and over. As I manage several different maps of locations, it makes it very handy for me.