CellID Finder - Find a cell phone location using LAC/CellID, GSM BTS coordinates
SnoopSnitch - Collects and analyses mobile radio data to make you aware of your mobile network security and to...
OpenCellID - OpenCelliD is the largest Open Database of Cell Towers & their locations. You can geolocate IoT & Mobile devices without GPS, explore Mobile Operator coverage and more!
GSM Spy Finder - Detect IMSI/IMEI/TMSI catchers and interception of voice and data over GSM networks
wigle.net - WiGLE (Wireless Geographic Logging Engine)
Network Cell Info - Network Cell Info is a cell network monitor and measurements log tool (4G+, LTE, CDMA, WCDMA, GSM).