Mozilla Stumbler!

The OpenSignal app will allow you to do several things, such as:

This app collects GPS locations of GSM/UMTS/LTE/CDMA cell towers and sends them to OpenCellID.org database. It is designed to help map the extent of mobile phone network coverage. It is also possible to collect measurements for private purposes and export them to CSV or GPX files.

collects the GPS coordinates of GSM cell towers for the open source project OpenCellID• sends the collected data automatically or manually to the OpenCellID servers• supports Wi-Fi data transmission• available in four languages: German, English, French, and Spanish• help texts and detailed information on all saved values in all four languages

Radiocells.org is a community project to collect informations on cell tower and wifi base stations and bring them on a map.The project itself was founded in 2009, then under the name openbmap.org.

WiGLE (Wireless Geographic Logging Engine)

Cellumap is a revolution in cellular coverage maps, in that the coverage maps here are not created by the network operators, but rather by the users of the network (ie: you!). The coverage maps that are given publicly by the network operators are usually very high-level (ie: not very detailed, no signal strength info) and become quickly out-of-date as the network changes almost daily. Cellumap allows people to plot accurate points (using GPS) and with actual recorded signal strength (and other information) in real-time! Your privacy is also guaranteed, as there is no phone number or account info ever recorded or displayed. »

The GSM Security Map at gsmmap.org compares the protection capabilities of mobile networks. This app collects data and adds it to GSM Map.This application currently only works on Android 4.1.2 Samsung S2 and S3 devices and requires root priviliges during the mobile network data capture.