Telecommunications

RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies

Open Source freemium $19.99 / Monthly (All-in-One Phone, Team Messaging, and Video Conferencing.)

Switch is a cloud-based phone system built for Google Apps users.

Easy to use Phone System with World-Class Support

paid $14.0 / Monthly

Get cheap international calling, international virtual number, Call Mama Gives an added advantage to send message and make calls to non-user of Callmama App.

paid $0.89 / Monthly

Numero eSIM is a phone-number app that makes voice and data possible anywhere in the world, for free.

Find a cell phone location using LAC/CellID, GSM BTS coordinates

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!

Global Call Forwarding offers local and international toll free numbers which can be forwarded to any phone, anywhere in the world.

paid Free Trial $7.95 / Monthly (For basic plan US to US)

Virtual cloud phone system for business

paid Free Trial $15.0 / Monthly

WiGLE (Wireless Geographic Logging Engine)

Open Source

Simplest way to own a business phone number

Proactively monitor and manage network and service quality to improve network performance with the leading mobile telecom Network Performance Management system: INNSIGHT.

paid

Mobile Phone plans and Services for highly mobile small business workers and entrepreneurs who run their lives from their phone.