I've been hearing a lot about a tool called Thinglink. This tool can make any image that you put on your website or blog interactive, so that a person who is looking at your image can hover over small dots and get information about things on your image.
Here is a video that shows Thinglink in action:
Click here to get Richard Byrne's take on Thinglink as well as some examples of how people are using Thinglink.
Here is a how-to video by Richard Byrne:
Here is a Mentor Mob (like a mini tool for learning online) to learn about Thinglink: