Grails is a web framework, for the JVM, built on top of Spring Boot. It leverages many features such as Spring-Powered dependency injection. It seamlessly and transparently integrates and interoperates with Java, the JVM, and existing Java EE containers.
 
The async features of Grails aim to simplify concurrent programming. Grails' features include the concept of Promises, a unified event model, and the use of RxJava to write reactive logic. With the use of application profiles, Grails allows you to build modern web applications. There are profiles to facilitate the construction of REST APIs or Web applications with a Javascript frontend.

Grails is a web framework, for the JVM, built on top of Spring Boot. It leverages many features such as Spring-Powered dependency injection. It seamlessly and transparently integrates and interoperates with Java, the JVM, and existing Java EE containers.

Grails - A Powerful Groovy-Based Web application framework for the JVM built on top of Spring Boot

Blazor lets you build interactive web UIs using C# instead of JavaScript. Blazor apps are composed of reusable web UI components implemented using C#, HTML, and CSS. Both client and server code is written in C#, allowing you to share code and libraries.
 
Blazor can run your client-side C# code directly in the browser, using WebAssembly. Because it's real .NET running on WebAssembly, you can re-use code and libraries from server-side parts of your application.
 
Alternatively, Blazor can run your client logic on the server. Client UI events are sent back to the server using SignalR - a real-time messaging framework. Once execution completes, the required UI changes are sent to the client and merged into the DOM.

Blazor lets you build interactive web UIs using C# instead of JavaScript. Blazor apps are composed of reusable web UI components implemented using C#, HTML, and CSS. Both client and server code is written in C#, allowing you to share code and libraries.

Blazor - Build client web apps with C#

Light 4j is a fast, lightweight and cloud native microservices framework. Light means lightweight, lighting fast and shed light on how to program with modern Java SE. It is 44 times faster than the most popular microservices platform Spring Boot embedded Tomcat and use only 1/5 of memory. 
Its features include: 
<ul>
<li>Plugin architecture for startup/shutdown hooks and middleware components</li>
<li>Distributed OAuth2 JWT security verification as part of the framework</li>
<li>Request and response validation against OpenAPI specification at runtime</li>
<li>Metrics collected in influxdb and viewed from Grafana Dashboard for both services and clients</li>
<li>Global exception handling for runtime exception, api exception and other checked exceptions</li>
<li>Mask sensitive data like credit card, sin number etc. before logging</li>
<li>Sanitize cross site scripting for query parameters, request headers and body</li>
<li>Audit to dump important info or entire request and response.</li>
<li>Body parser to support different content types</li>
<li>Standardized response code and messages from configuration file</li>
<li>Externalized configuration for all modules for dockerized environment</li>
<li>CORS pre-flight handler for SPA (Angular or React) from another domain</li>
<li>Rate limiting for services that exposed outside to the Internet</li>
<li>Service registry and discovery support direct, Consul and Zookeeper</li>
<li>Client side discovery and load balance to eliminate proxies</li>
<li>A client module that is tightly integrated with Light-OAuth2 and supports traceability</li>
</ul>

Light 4j is a fast, lightweight and cloud native microservices framework. Light means lightweight, lighting fast and shed light on how to program with modern Java SE. It is 44 times faster than the most popular microservices platform Spring Boot embedded Tomcat and use only 1/5 of memory.

light-4j - A fast, lightweight and more productive microservices framework

MyFaces is a family of projects related to the JavaServer Faces (JSF) specification published as part of the Java Community Process. The "core" project is an implementation of that specification. Other MyFaces projects implement related specifications (eg the Portlet Bridge), or add features to any JSF implementation (not just the Myfaces Core). JavaServer(tm) Faces (JSF) is a web application framework specification (JSR252, JSR127) based around the model-view-controller pattern. The Apache MyFaces project provides both an implementation of the JSF specification ("MyFaces Core"), and a set of add-on libraries that work on any implementation of the specification (including, of course, Apache MyFaces Core). JSF is quite similar to the <a class="http" href="http://jakarta.apache.org/tapestry">Tapestry framework</a> as that is also a component-based framework. JSF can also fill the same "niche" as the well-known <a class="http" href="http://jakarta.apache.org/struts/">Struts framework</a>, but has a rather different approach.

 The Apache MyFaces project provides: 
 <UL>
	<LI>A JavaServer(tm) Faces implementation (MyFaces API, MyFaces Impl modules)</LI>
	<LI>Several component libraries containing UI widgets for building web-applications with JSF (e.g. MyFaces Tomahawk, MyFaces Trinidad, MyFaces Tobago)</LI>
	<LI>Extension packages to JavaServer(tm) Faces (e.g. MyFaces Orchestra, MyFaces Extensions Validator)</LI>
	<LI>integration modules to other technologies and standards (e.g. MyFaces Portlet Bridge for integration with the portlet-standard)</LI>
 </UL>

MyFaces is a family of projects related to the JavaServer Faces (JSF) specification published as part of the Java Community Process. The "core" project is an implementation of that specification. Other MyFaces projects implement related specifications (eg the Portlet Bridge), or add features to any JSF implementation (not just the Myfaces Core).

MyFaces

Blade is a pursuit of simple, efficient Web framework, so that Java web development even more powerful, both in performance and flexibility. The design is simple, easy to understand and doesn't introduce many layers between you and the standard library. The goal of this project is that the users should be able to understand the whole framework in a single day. It supports RESTful style routing interface. It has no invasive interceptors and provides the writing of DSL grammar.
<ul>
<li> A new generation of MVC frameworks that do not depend on more libraries</li>
<li> Get rid of SSH's bloated, modular design</li>
<li> Source less than <code>500kb</code>, learning is also simple</li>
<li> Restful style routing design</li>
<li> Template engine support, view development more flexible</li>
<li> High performance, 100 concurrent qps 14w/s</li>
<li> Run the <code>JAR</code> package to open the web service</li>
<li> Streaming API style</li>
<li> Supports plug-in extensions</li>
<li> Support webjars resources</li>
<li> Built-in a variety of commonly used middleware</li>
<li> Built-in JSON output</li>
<li> JDK8 +</li>
</ul>

Blade is a pursuit of simple, efficient Web framework, so that Java web development even more powerful, both in performance and flexibility. The design is simple, easy to understand and doesn't introduce many layers between you and the standard library. The goal of this project is that the users should be able to understand the whole framework in a single day. It supports RESTful style routing interface. It has no invasive interceptors and provides the writing of DSL grammar.

Blade - Lightning fast and elegant MVC framework for Java8

JHipster is a Yeoman generator, used to create a Spring Boot + Angular project. Its goal is to generate for you a complete and modern Web app. It provides a high-performance and robust Java stack on the server side with Spring Boot, A sleek, modern, mobile-first front-end with Angular and Bootstrap and a powerful workflow to build your application with Yeoman, Webpack/Gulp and Maven/Gradle.

JHipster - Create  Spring Boot + Angular projects in seconds

Micronaut is a modern, JVM-based, full stack microservices framework designed for building modular, easily testable microservice applications. Micronaut is developed by the creators of the Grails framework and takes inspiration from lessons learnt over the years building real-world applications from monoliths to microservices using Spring, Spring Boot and Grails.
 
Micronaut apps startup in tens of milliseconds with GraalVM. It features a Dependency Injection and Aspect-Oriented Programming runtime that uses no reflection. Micronaut's Cloud support is built right in, including support for common discovery services, distributed tracing tools, and cloud runtimes.

Micronaut is a modern, JVM-based, full stack microservices framework designed for building modular, easily testable microservice applications. Micronaut is developed by the creators of the Grails framework and takes inspiration from lessons learnt over the years building real-world applications from monoliths to microservices using Spring, Spring Boot and Grails.

Micronaut  - A modern, JVM-based, full-stack framework for building modular, easily testable microservice and serverless applications

RESTX is the lightweight, modular, feature rich, blazing fast, open source Java REST framework. It shares similarities with modern frameworks like Play! like hot compile and a very productive experience, but focused on REST and pure Java.
 
It is focused more on Rest. This implies that it’s not a general web framework, i.e., there is no templating mechanism. It’s better use with a JavaScript framework on the client side, and you can always use any other templating mechanism to serve your pages.

RESTX is the lightweight, modular, feature rich, blazing fast, open source Java REST framework. It shares similarities with modern frameworks like Play! like hot compile and a very productive experience, but focused on REST and pure Java.

RESTX - the lightweight Java REST framework

Griffon is desktop application development platform for the JVM. Inspired by Grails, Griffon leverages concepts like Convention over Configuration, modularity, and freedom of choice. The framework at its core is written 100% in Java allowing developers to write their own applications with only Java. Other programming languages such as Groovy and Kotlin may be used too, in which case additional capabilities such as builders and extension methods become available.
 
Griffon encourages the use of the MVC pattern. Griffon also follows in the spirit of the Swing Application Framework (JSR 296), it defines a simple yet powerful application life cycle and event publishing mechanism. Another interesting feature comes from the Groovy language itself: automatic property support and property binding (inspired by BeansBinding (JSR 295)), which makes creating observable beans and binding to their properties a snap! As if property binding was not enough Groovy’s SwingBuilder also simplifies building multi-threaded applications, say goodbye to the ugly gray rectangle (the bane of Swing apps)!

Griffon is desktop application development platform for the JVM. Inspired by Grails, Griffon leverages concepts like Convention over Configuration, modularity, and freedom of choice. The framework at its core is written 100% in Java allowing developers to write their own applications with only Java. Other programming languages such as Groovy and Kotlin may be used too, in which case additional capabilities such as builders and extension methods become available.

Griffon - Next generation desktop application development platform for the JVM

Xenon is a framework for writing small REST-based services. (Some people call them microservices.) The runtime is implemented in Java and acts as the host for the lightweight, asynchronous services. The programming model is language agnostic (does not rely on Java specific constructs) so implementations in other languages are encouraged. The services can run on a set of distributed nodes. Xenon provides replication, synchronization, ordering, and consistency for the state of the services. Because of the distributed nature of Xenon, the services scale well and are highly available.
 
Xenon is a "batteries included" framework. Unlike some frameworks that provide just consistent data replication or just a microservice framework, Xenon provides both. Xenon services have REST-based APIs and are backed by a consistent, replicated document store.
 
The lightweight runtime enables the creation of highly available and scalable applications in the form of cooperating light weight services. The operation model for a cluster of Xenon nodes is the same for both on premise, and service deployments.

Xenon is a framework for writing small REST-based services. (Some people call them microservices.) The runtime is implemented in Java and acts as the host for the lightweight, asynchronous services. The programming model is language agnostic (does not rely on Java specific constructs) so implementations in other languages are encouraged. The services can run on a set of distributed nodes. Xenon provides replication, synchronization, ordering, and consistency for the state of the services. Because of the distributed nature of Xenon, the services scale well and are highly available.

Xenon - Decentralized Control Plane Framework

Spincast is a framework to serve as a backend for Single Page Applications (SPA), to develop old-school HTML generated websites or to be a REST API services platform. Spincast aims to feel more like a library than like a framework. It is not opinionated and favors configuration over convention. Its main goal is to give power to the developers. 

Spincast is an highly flexible and open source Java web framework, based on Guice

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