I am graphic designer/developer and I am touring for 4 years around the world. I always shared my experiences on my website (http://www.twomonkeysinwinter.com) where I use a Googlemap where you can see where I am and other details. After having several travelers who asked me to do the same kind of map for them, I just created Nomadstep.com.
It's free, you can create your map and then share the URL to your friends and family. One other goal is also to meet other travelers if you see them on the map, going in your direction for example. If you are traveling with a GPS (SPOT) you can also connect it to the website and update your position automatically.
It is a beta version, or even alpha as there are bugs, no mobile version to update the map and no app either. I am working on it every time I have the chance. I'm all ears if you have any questions, suggestions or want to help.