Google Test - Google Test is a unit testing for C++ programming language that is based on xUnit architecture.
Numlooker - Numlooker is a web-based tool that is used to reverse the phone number that you have received.
UnitTest++ - Download JF Unittest for free. A C++ unittest framework, written out of frustration with the existing unittest frameworks out there. No GUI with colorful progress bars, no dependencies on any other package in the world.
NumLookup - NumLookup is a web-based platform that helps you to get information about a person by providing a phone number.
Criterion - A dead-simple, yet extensible, C test framework.
Rap Sheet Reverse Caller ID - Rap Sheet Reverse Caller ID is an application that provides you the option to search the information about unknown numbers.