Karate is the only open-source tool to combine API test-automation, mocks, performance-testing and even UI automation into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers. Assertions and HTML reports are built-in, and you can run tests in parallel for speed.
 
Its features include: 
<ul>
<li>Scripts are plain-text, require no compilation step or IDE, and teams can collaborate using Git / standard SCM</li>
<li>Elegant&nbsp;<a href="https://en.wikipedia.org/wiki/Domain-specific_language">DSL</a>&nbsp;syntax &lsquo;natively&rsquo; supports JSON and XML - including&nbsp;<a href="https://karatelabs.github.io/karate/#set">JsonPath</a>&nbsp;and&nbsp;<a href="https://karatelabs.github.io/karate/#xpath-functions">XPath</a>&nbsp;expressions</li>
<li>Tests are super-readable - as scenario data can be expressed in-line, in human-friendly&nbsp;<a href="https://karatelabs.github.io/karate/#json">JSON</a>,&nbsp;<a href="https://karatelabs.github.io/karate/#xml">XML</a>, Cucumber&nbsp;<a href="https://karatelabs.github.io/karate/#the-cucumber-way">Scenario</a>&nbsp;Outline&nbsp;<a href="https://karatelabs.github.io/karate/#table">tables</a>, or a&nbsp;<a href="https://karatelabs.github.io/karate/#set-multiple">payload builder</a>&nbsp;approach&nbsp;<a href="https://gist.github.com/ptrthomas/d6beb17e92a43220d254af942e3ed3d9">unique to Karate</a></li>
<li><a href="https://github.com/intuit/karate/wiki/IDE-Support#vs-code-karate-plugin">Fully featured debugger</a>&nbsp;that can step&nbsp;backwards&nbsp;and even&nbsp;<a href="https://twitter.com/KarateDSL/status/1167533484560142336">re-play a step while editing it</a>&nbsp;- a&nbsp;huge&nbsp;time-saver</li>
<li>Ideal for testing the highly dynamic responses from&nbsp;<a href="http://graphql.org/">GraphQL</a>&nbsp;API-s because of Karate&rsquo;s built-in&nbsp;<a href="https://karatelabs.github.io/karate/#text">text-manipulation</a>&nbsp;and&nbsp;<a href="https://github.com/json-path/JsonPath#path-examples">JsonPath</a>&nbsp;capabilities</li>
<li>Re-use of payload-data and user-defined functions across tests is&nbsp;<a href="https://karatelabs.github.io/karate/#reading-files">so easy</a>&nbsp;- that it becomes a natural habit for the test-developer</li>
<li>Support for&nbsp;<a href="https://karatelabs.github.io/karate/#data-driven-tests">data-driven tests</a>&nbsp;and being able to&nbsp;<a href="https://karatelabs.github.io/karate/#tags">tag or group</a>&nbsp;tests is built-in, no need to rely on an external framework</li>
<li>Multi-threaded&nbsp;<a href="https://karatelabs.github.io/karate/#parallel-execution">parallel execution</a>, which is a huge time-saver, especially for integration and end-to-end tests</li>
<li>Option to use as a light-weight&nbsp;<a href="https://github.com/intuit/karate/tree/master/karate-netty#standalone-jar">stand-alone executable</a>&nbsp;- convenient for teams not comfortable with Java</li>
<li>Cross platform&nbsp;<a href="https://karatelabs.github.io/karate/karate-robot">Desktop Automation</a>&nbsp;that can be&nbsp;<a href="https://twitter.com/ptrthomas/status/1215534821234995200">mixed into Web Automation flows</a>&nbsp;if needed</li>
<li>Gatling integration can hook into&nbsp;<a href="https://github.com/intuit/karate/tree/master/karate-gatling#custom">any&nbsp;custom Java code</a>&nbsp;- which means that you can perf-test even non-HTTP protocols such as&nbsp;<a href="https://github.com/thinkerou/karate-grpc">gRPC</a></li>
<li><a href="https://karatelabs.github.io/karate/karate-mock-servlet">Mock HTTP Servlet</a>&nbsp;that enables you to test&nbsp;any&nbsp;controller servlet such as Spring Boot / MVC or Jersey / JAX-RS - without having to boot an app-server, and you can use your HTTP integration tests un-changed</li>
<li>&nbsp;</li>
</ul>

Karate is the only open-source tool to combine API test-automation, mocks, performance-testing and even UI automation into a single, unified framework. The BDD syntax popularized by Cucumber is language-neutral, and easy for even non-programmers. Assertions and HTML reports are built-in, and you can run tests in parallel for speed.

karate - Test Automation Made Simple

The Atmosphere Framework contains client and server side components for building Asynchronous Web Applications. It transparently supports WebSockets, Server Sent Events (SSE), Long-Polling, HTTP Streaming (Forever frame) and JSONP. Its mission is to make real time apps possible in every browser, library and mobile device, blurring the differences between the different transport mechanisms.
 
The Atmosphere Framework Stack works on all Servlet based servers, Spring Boot and frameworks like Netty, Play! Framework and Vert.x. We support a variety of extensions like Apache Kafka, Hazelcast, RabbitMQ, Redis and many more.

The Atmosphere Framework contains client and server side components for building Asynchronous Web Applications. It transparently supports WebSockets, Server Sent Events (SSE), Long-Polling, HTTP Streaming (Forever frame) and JSONP. Its mission is to make real time apps possible in every browser, library and mobile device, blurring the differences between the different transport mechanisms.

Atmosphere - Realtime Client Server Framework for the JVM

Armeria is your go-to microservice framework for any situation. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard. Armeria is capable of running services using different protocols, all on a single port. No need for any proxies or sidecars.
 
Armeria's documentation service allows you to browse the complete list of services and their documentation from a web browser. It provides various service discovery mechanisms, from Kubernetes-style DNS records to ZooKeeper data nodes.
 
Armeria is from the creator of <a href="https://netty.io/">Netty</a>&nbsp;and his colleagues at <a href="https://engineering.linecorp.com/en/">LINE</a>

Armeria is your go-to microservice framework for any situation. You can build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard. Armeria is capable of running services using different protocols, all on a single port. No need for any proxies or sidecars.

Armeria - Build any type of microservice leveraging your favorite technologies, including gRPC, Thrift, Kotlin, Retrofit, Reactive Streams, Spring Boot and Dropwizard

ThingsBoard is an open-source IoT platform for data collection, processing, visualization, and device management. It enables device connectivity via industry standard IoT protocols - MQTT, CoAP and HTTP and supports both cloud and on-premises deployments. ThingsBoard combines scalability, fault-tolerance and performance so you will never lose your data.
 
It helps to provision and manage devices and assets, Collect and visualize data, Raise alarms on incoming telemetry events, Construct your ThingsBoard cluster and get maximum scalability and fault-tolerance with microservices architecture. Construct your ThingsBoard cluster and get maximum scalability and fault-tolerance with microservices architecture.

ThingsBoard is an open-source IoT platform for data collection, processing, visualization, and device management. It enables device connectivity via industry standard IoT protocols - MQTT, CoAP and HTTP and supports both cloud and on-premises deployments. ThingsBoard combines scalability, fault-tolerance and performance so you will never lose your data.

ThingsBoard - IoT platform for data collection, processing, visualization, and device management

Kubernetes has made it very easy to deploy applications to the cloud at a higher scale than ever, but the development practices have not evolved at the same speed as application deployment patterns. Today, most developers try to either run parts of the infrastructure locally, or just test these integrations directly in the cluster via CI jobs or the "docker build, docker push, kubectl apply" cycle. It works, but this workflow is painful and incredibly slow.

Okteto - A Tool for Cloud Native Developers

Dapr is a portable, serverless, event-driven runtime that makes it easy for developers to build resilient, stateless and stateful microservices that run on the cloud and edge and embraces the diversity of languages and developer frameworks. Dapr codifies the best practices for building microservice applications into open, independent, building blocks that enable you to build portable applications with the language and framework of your choice. Each building block is independent and you can use one, some, or all of them in your application.

Dapr - portable, event-driven, runtime for building distributed applications across cloud and edge

KumuluzEE is a lightweight framework for developing microservices using standard Java/JavaEE/JakartaEE/EE4J technologies, extending them with Node.js, Go and other languages, and migrating existing applications to microservices and cloud-native architecture. KumuluzEE packages microservices as standalone JARs. KumuluzEE microservices are lightweight and optimized for size and start-up time. They fit perfectly with Docker containers. KumuluzEE microservices are fully compatible with Kubernetes.
 
KumuluzEE also provides extensions for developing common patterns in cloud-native architectures, including configuration, logging, discovery, fault tolerance with circuit-breakers, metrics, security, event streaming and more.

KumuluzEE is a lightweight framework for developing microservices using standard Java/JavaEE/JakartaEE/EE4J technologies, extending them with Node.js, Go and other languages, and migrating existing applications to microservices and cloud-native architecture. KumuluzEE packages microservices as standalone JARs. KumuluzEE microservices are lightweight and optimized for size and start-up time. They fit perfectly with Docker containers. KumuluzEE microservices are fully compatible with Kubernetes.

kumuluz - Lightweight open-source framework for developing microservices using standard Java EE technologies and migrating Java EE to cloud-native architecture

Apache APISIX is a dynamic, real-time, high-performance API gateway. APISIX provides rich traffic management features such as load balancing, dynamic upstream, canary release, circuit breaking, authentication, observability, and more. You can use Apache APISIX to handle traditional north-south traffic, as well as east-west traffic between services. It can also be used as a k8s ingress controller.
 
You can use Apache APISIX as a traffic entrance to process all business data, including dynamic routing, dynamic upstream, dynamic certificates, A/B testing, canary release, blue-green deployment, limit rate, defense against malicious attacks, metrics, monitoring alarms, service observability, service governance, etc.

Apache APISIX is a dynamic, real-time, high-performance API gateway. APISIX provides rich traffic management features such as load balancing, dynamic upstream, canary release, circuit breaking, authentication, observability, and more. You can use Apache APISIX to handle traditional north-south traffic, as well as east-west traffic between services. It can also be used as a k8s ingress controller.

Apache APISIX - Dynamic, real-time, high-performance API gateway

Micro is an operating system built for the cloud. It addresses the key requirements for building services in the cloud. It leverages the microservices architecture pattern and provides a set of services which act as the building blocks of a platform. Micro deals with the complexity of distributed systems and provides simpler programmable abstractions to build on.
 
Micro is built as a microservices architecture and abstracts away the complexity of the underlying infrastructure. It is composed as a single logical server to the user but decompose that into the various building block primitives that can be plugged into any underlying system.
The server is composed of the following services.<ul>
 <li>API - HTTP Gateway which dynamically maps http/json requests to RPC using path based resolution</li>
 <li>Auth - Authentication and authorization out of the box using jwt tokens and rule based access control.</li>
 <li>Broker - Ephemeral pubsub messaging for asynchronous communication and distributing notifications</li>
 <li>Config - Dynamic configuration and secrets management for service level config without the need to restart</li>
 <li>Events - Event streaming with ordered messaging, replay from offsets and persistent storage</li>
 <li>Network - Inter-service networking, isolation and routing plane for all internal request traffic</li>
 <li>Proxy - An identity aware proxy used for remote access and any external grpc request traffic</li>
 <li>Runtime - Service lifecycle and process management with support for source to running auto build</li>
 <li>Registry - Centralised service discovery and API endpoint explorer with feature rich metadata</li>
 <li>Store - Key-Value storage with TTL expiry and persistent crud to keep microservices stateless</li></ul>

Micro is an operating system built for the cloud. It  addresses the key requirements for building services in the cloud. It leverages the microservices architecture pattern and provides a set of services which act as the building blocks of a platform. Micro deals with the complexity of distributed systems and provides simpler programmable abstractions to build on.

Micro - Distributed Cloud OS 

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