Japa is an API-first testing framework. It focuses only on testing Node.js (backend) applications, thus resulting in a fast, small, and simple tests runner. 
<ul>
<li>Support for <a href="https://japa.dev/grouping-tests" rel="nofollow">test groups</a>, timeout, todo tests and <a href="https://japa.dev/underlying-test-class#fails" rel="nofollow">regression tests</a>.</li>
<li>Support for <a href="https://japa.dev/datasets" rel="nofollow">Datasets</a>.</li>
<li>Assertion libraries with support for <a href="https://japa.dev/assertion-planning" rel="nofollow">assertion planning</a>.</li>
<li>Ability to <a href="https://japa.dev/filtering-tests" rel="nofollow">filter</a> and run specific or only failing tests.</li>
<li>Re-imagined <a href="https://japa.dev/lifecycle-hooks" rel="nofollow">lifecycle hooks</a>.</li>
<li>Multiple <a href="https://japa.dev/plugins/spec-reporter" rel="nofollow">reporters</a> to display tests progress.</li>
<li>Great CLI experience with pretty diffs and formatted error stacks.</li>
<li>Works with ESM and <a href="https://japa.dev/usage-with-typescript" rel="nofollow">TypeScript</a> both with zero additional setup.</li>
</ul>

Japa is an API-first testing framework. It focuses only on testing Node.js (backend) applications, thus resulting in a fast, small, and simple tests runner. 

Japa - API-first testing framework

Sahi is an automation and testing tool for web applications, with the facility to record and playback scripts. 

Sahi - Web Automation and Test Tool

Atmosphere is a simply a black-box testing framework for native android applications. You can configure which tests are going to be executed on which device. You can even specify tests to be run on multiple different, in parameters devices, simultaneously. 

Atmosphere - Black box testing framework for Android

Tsung is an open-source multi-protocol distributed load testing tool. It can be used to stress HTTP, WebDAV, SOAP, PostgreSQL, MySQL, LDAP and Jabber/XMPP servers.  The purpose of Tsung is to simulate users in order to test the scalability and performance of IP based client/server applications. You can use it to do load and stress testing of your servers. Many protocols have been implemented and tested, and it can be easily extended. 

Tsung - Distributed Load Testing Tool

SoapUI is the Functional Testing tool for SOAP and REST testing. With its easy-to-use graphical interface, and enterprise-class features, SoapUI allows you to easily and rapidly create and execute automated functional, regression, and load tests. In a single test environment, SoapUI provides complete test coverage - from SOAP and REST-based Web services, to JMS enterprise messaging layers, databases, Rich Internet Applications, and much more. 

SoapUI - Functional testing solution for APIs and web services

Kiwi TCMS is a test plan, test run and test case management system, written in Python and Django. It features Bugzilla and JIRA integration, fast test plan and runs search, powerful access control for each plan, run and case, and XML-RPC APIs. It provides support to define test plans and cases, track progress and assign work across multiple teams. Perform peer reviews.

Kiwi TCMS - Test case management system  

Growth Book is an open source experimentation platform designed for companies that want to bring A/B testing in-house, but don't want to build it themselves. It supports experimentation with deep code integration or using a visual front-end editor. 

GrowthBook - The Open Source A/B Testing Platform

Randoop generates unit tests using feedback-directed random test generation. This technique pseudo-randomly, but smartly, generates sequences of method/constructor invocations for the classes under test. Randoop executes the sequences it creates, using the results of the execution to create assertions that capture the behavior of your program. Randoop creates tests from the code sequences and assertions. 
 
 Randoop can be used for two purposes: to find bugs in your program, and to create regression tests to warn you if you change your program's behavior in the future.

Randoop generates unit tests using feedback-directed random test generation. This technique pseudo-randomly, but smartly, generates sequences of method/constructor invocations for the classes under test. Randoop executes the sequences it creates, using the results of the execution to create assertions that capture the behavior of your program. Randoop creates tests from the code sequences and assertions. 

Randoop - Automatic test generation for Java

Keploy is a no-code testing platform that generates tests from API calls. It converts API calls into testcases. Mocks are automatically generated with the actual request/responses.
 
It can automatically mock network/external dependencies with correct responses. No more manually writing mocks for dependencies like DBs, internal services, or third party services like twilio, shopify or stripe. It can safely replay writes or mutations by capturing from local or other environments. 
 
It also does automatic instrumentation for popular libraries/drivers like sql, http, grpc, etc. Web Console is available to visually understand the results, update behaviour and share findings across your team.

Keploy is a no-code testing platform that generates tests from API calls. It converts API calls into testcases. Mocks are automatically generated with the actual request/responses.

Keploy - No code API testing platform. Create unit tests and data mocks from API calls

Scenarigo is a scenario-based API testing tool for HTTP/gRPC server. It is written in Go, enable to customize by the plugin package of Go. You can write test scenarios as YAML files and executes them.

Scenarigo - An end-to-end scenario testing tool for HTTP/gRPC server

Powerful declarative end-to-end testing for APIs that works for you! No coding required. Simple to run on any continuous integration tool. Model complex real world customer flows with multiple steps with our extensive declarative syntax.

apid - Declarative API end to end testing framework

Quickstrom simulates complex and unexpected user behavior using generative random testing. When the specification is violated, Quickstrom finds a minimal failing example. It generates thousands of test cases instead of writing them manually and lowers the maintenance burden of your browser testing by writing concise specifications with looser coupling to your implementation.

Quickstrom - High-confidence browser testing

Pown.js is a security testing and exploitation toolkit built on top of Node.js and NPM. Unlike traditional security tools like Metasploits, Pown.js considers frameworks to be an anti-pattern. Therefore, each module in Pown is in fact a standalone NPM module allowing greater degree of reuse and flexibility. Creating new modules is a matter of publishing to NPM and tagging it with the correct tags. The rest is handled automatically.

Pown.js - Security testing and exploitation toolkit built on top of Node.js and NPM

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