Apple’s Find My Friends app is a decent way to keep track of where your friends are located, but only if those friends are also using Apple devices. Glympse ups the ante by working on Apple, Android, Windows Phone and BlackBerry devices. You can use advanced features like sharing your location only for a set amount of time, and anyone you share your location with can see where you’re at without needing to download the app.
Glympse [iTunes]