EnvJasmine allows you to run headless JavaScript tests.

JSLitmus is a lightweight tool for creating ad-hoc JavaScript benchmark tests. Features include:
* Single-file install (JSLitmus.js)
* Works on Firefox, Opera, Safari, IE, Google Chrome, and iPhone browsers
* Adaptive test cycles - tests take ~1-2 seconds, regardless of the operation
* Google Chart + TinyUrl integration

srclib makes developer tools like editor plugins and code search better. It supports things like jump to definition, find usages, type inference, and documentation generation. srclib consists of language analysis toolchains (currently for Go, Python, JavaScript, and Ruby) with a common output format, and developer tools that consume this format. srclib originated inside ✱ Sourcegraph, where it powers intelligent code search over hundreds of thousands of projects.

DataFactory is an open source tool that allows you to easily generate test data. It was primarily written for populating database for dev or test environments by providing values for names, addresses, email addresses, phone numbers, text, and dates.

Moment.js is an open source library to parse, validate, manipulate, and display dates in JavaScript.

Test'em 'Scripts is a terminal-based test runner that makes cross browser Javascript unit testing easy.

Poltergeist is a driver for Capybara. It allows you to run your Capybara tests on a headless WebKit browser, provided by PhantomJS.

Enzyme is an open source JavaScript Testing utility for React that makes it easier to assert, manipulate, and traverse your React Components' output. Enzyme's API is meant to be intuitive and flexible by mimicking jQuery's API for DOM manipulation and traversal. Enzyme is unopinionated regarding which test runner or assertion library you use, and should be compatible with all major test runners and assertion libraries out there. The documentation and examples for enzyme use mocha and chai, but you should be able to extrapolate to your framework of choice.

IronPigeon is a decentralized communication protocol that provides high confidentiality and authenticity for the messages.

xUnit.net is a free, open source, community-focused unit testing tool for the .NET Framework. Written by the original inventor of NUnit v2, xUnit.net is the latest technology for unit testing C#, F#, VB.NET and other .NET languages. Works with ReSharper, CodeRush, and TestDriven.NET.