There are quite a few apps out there that share your location data and allow you to check in at a place, like Foursquare, Facebook, etc. They’re pretty fantastic, and they let your friends see where you are at, and then come meet you.
But what if you want to share where you are going to be in a little while? What about letting your friends know that you’re on your way, and letting them track where you are, how far away you are, and when you’ll arrive at a certain location? Glympse has got your back for that very thing, and some other great stuff.