A free program for Android, by FindLostCellPhone.

One of the top lost phone locator apps is the Find Lost Phone. This app employs internet GPS tracking to locate your lost, stolen, or forgotten phone. The Find Lost Phone application is here to assist you if you have ever dealt with the stress of trying to locate a misplaced silent phone or a stolen or lost phone. Find My Phone is a free GPS tracker that can save your life. It is a free GPS mobile locator app that acts as an anti-theft and anti-lost device whenever you misplace your phone, or it gets taken by a thief.