Tile - Track your lost items
Android Lost - Remotely control your Android phone from the internet or by SMS. Features:
FoundIt! - Keep your things safe with self-printed QR codes
Find My - Find My can help you locate your devices and your friends and family.
Wistiki - Locate lost items with location tags
PhoneTrack - Nextcloud app to create tracking sessions to display phones position in real time and export activity to gpx.