DroidTracker allows Android device users to share their exact location (using readable address and google map link) using SMS, Mail and Twitter.
· Contacts send a request SMS to your phone and receive your location back (once or periodically)
e-Mobile family locator - Easily find friends and family by sending a text message from your phone or web.
Locate device and people
* Locate people and lost device by sending a "locate" text message.
* Generate a ringtone on missing device by sending a "ping" text message
eGPS Lite has full GPS capabilities, showing latitude and longitude, altitude, speed, and heading. This makes it useful for all kinds of activities where you would usually want a GPS device - hiking, cycling, geocaching and letterboxing, running, location-based social networking activities, and more
Foursquare - helps you explore the world around you. Keep up with friends, get insider tips, and unlock discounts and rewards.
While on the go, you can easily tell friends where you are, share pictures, get their comments ("I'm right around the corner, I'll stop by to say hello"), and get insider tips ("order the Lobster Ravioli; it's the best dish by far
GeoPix - Headed to work or class? Want your school's mascot or company logo to show up as your wallpaper, "abracadabra" style, just as you arrive? Simply choose an image from Myxer’s massive catalog of wallpapers, or grab one from your phone, set the address- and watch it "auto-magically" appear as you reach your destination
Glympse - Safely share your location in real-time via email, SMS, Facebook, or Twitter.
"Glympse: The Coolest Thing Your Smartphone Can Do"
-FastCompany
Glympse is the easy way to safely share your location in realtime. No sign-up needed. No social network to manage. Just send a Glympse to anyone via email, SMS, Facebook, or Twitter
GoPenS is an OpenSource GPS application for Android phones, based on OpenStreetMap (OSM). OpenStreetMap is a collaborative map of the world. Therefore, one of the main functions of the application is to be able to record a trace and send it as a GPX to the OSM servers, and so edit the OSM Map