Tile - Track your lost items
Clap To Find My Phone - Clap To Find My Phone is a free-to-use app through which you can precisely discover your cell phones and tablets just by clapping.
FoundIt! - Keep your things safe with self-printed QR codes
The O - Never lose anything again
Wistiki - Locate lost items with location tags
Google Lost Phone Finder - Locate, lock, and secure a lost phone