heatmapper.ca
HeatmapperClick in the menu above or on the buttons below to start making your heat map! Heatmapper is a freely available web server that allows users to interactively visualize their data in the form of heat maps through an easy-to-use graphical interface. Heatmapper is a versatile tool that allows users to easily create a wide variety of heat maps for many different data types and applications. Heatmapper allows users to generate, cluster and visualize: 1) expression-based heat maps. 4) image overlay heat maps.
http://www.heatmapper.ca/