Android/iOS/Windows Mobile: If your main objection to location sharing services is that you don't want to share your location all the time and when you do you'd like easy and private sharing, Glympse is a private and real-time location sharing tool.
Glympse fills a much needed niche in the location sharing world. Glympse offers you the ability to share your location, including not just the location at the moment you share it but your in-progress travel, with anyone for a limited window of time. Traveling to see a friend on the other side of the state and dinner hinges on your arrival? Send him a Glympse of your travel plans and he'll be able to keep an eye, in real time, on your trek across the interstate. The recipient doesn't need special software or an account of any kind, just a web browser to access the link you share via SMS, email, Twitter, or Facebook.
Glympse is free and available for Android, iOS, and Windows Mobile phones. Visit the link below for additional information and a chance to try out a demonstration of the service.
Glympse [via Addictive Tips]