Friends Density

Friends Density is an application based on Google Maps that shows a density heatmap of your friends' locations. The user can see where his/her friends are located anywhere in the world.

Version 3 of the application was released on May 4th, 2009. The new version is a huge improvement over the previous version and it also has much more interactive features.

Also featured: A dynamic density map of your online friends that updates itself every minute!