JUnit is described as 'Unit testing framework for the Java programming language. JUnit has been important in the development of test-driven development, and is one of a family of unit testing frameworks collectively known as xUnit that originated with SUnit' and is a Unit Testing tool in the development category. There are three alternatives to JUnit for Windows, Linux and Mac. The best JUnit alternative is TestNG, which is free. Other great apps like JUnit are NUnit and XUnit.
TestNG is a testing framework inspired from JUnit and NUnit but introducing some new functionalities that make it more powerful and easier to use.
TestNG is the most popular Windows, Mac & Linux alternative to JUnit.
TestNG is the most popular free alternative to JUnit.
NUnit is a unit-testing framework for all .Net languages. Initially ported from JUnit, the current production release, version 2.5, is the sixth major release of this xUnit based unit testing tool for Microsoft .NET.
NUnit is the most popular Open Source alternative to JUnit.
xUnit.net is a developer testing framework, built to support Test Driven Development, with a design goal of extreme simplicity and alignment with framework features. It is compatible with .NET Framework 2.
