Corda is an open source blockchain project, designed for business from the start. Only Corda allows you to build interoperable blockchain networks that transact in strict privacy. Corda's smart contract technology allows businesses to transact directly, with value. The smart contract can be written in Java and other JVM languages. It is a flow framework to manage communication and negotiation between participants.

Corda - Open source blockchain project, designed for business from the start

Ktor is a framework for quickly creating web applications in Kotlin with minimal effort.Ktor Framework doesn't impose a lot of constraints on what technology a project is going to use – logging, templating, messaging, persistent, serializing, dependency injection, etc. Sometimes it may be required to implement a simple interface, but usually it is a matter of writing a transforming or intercepting function. Features are installed into application using unified interception mechanism which allows building arbitrary pipelines.
 
Ktor Application can be hosted in any servlet container with Servlet 3.0+ API support such as Tomcat, or standalone using Netty or Jetty. Support for other hosts can be added through the unified hosting API. Ktor pipeline machinery and API is utilising Kotlin coroutines to provide easy-to-use asynchronous programming model without making it too cumbersome. All host implementations are using asynchronous I/O facilities to avoid thread blocking.

Ktor is a framework for quickly creating web applications in Kotlin with minimal effort. Ktor Framework doesn't impose a lot of constraints on what technology a project is going to use – logging, templating, messaging, persistent, serializing, dependency injection, etc. Sometimes it may be required to implement a simple interface, but usually it is a matter of writing a transforming or intercepting function. Features are installed into application using unified interception mechanism which allows building arbitrary pipelines.

Ktor - Framework for quickly creating connected applications in Kotlin with minimal effort

Sample Android Components Architecture on a modular word focused on the scalability, testability and maintainability written in Kotlin, following best practices using Jetpack. The goal of the project is to demonstrate best practices, provide a set of guidelines, and present modern Android application architecture that is modular, scalable, maintainable and testable. This application may look simple, but it has all of these small details that will set the rock-solid foundation of the larger app suitable for bigger teams and long application lifecycle management.

Android Components Architecture in a Modular Word

LeakCanary is a memory leak detection library for Android. LeakCanary’s knowledge of the internals of the Android Framework gives it a unique ability to narrow down the cause of each leak, helping developers dramatically reduce OutOfMemoryError crashes.
 
In a Java based runtime, a memory leak is a programming error that causes an application to keep a reference to an object that is no longer needed. As a result, the memory allocated for that object cannot be reclaimed, eventually leading to an OutOfMemoryError (OOM) crash.
 
For example, an Android Activity instance is no longer needed after its onDestroy() method is called, and storing a reference to that instance in a static field prevents it from being garbage collected. LeakCanary will help you find and fix these memory leaks during development.

LeakCanary is a memory leak detection library for Android. LeakCanary’s knowledge of the internals of the Android Framework gives it a unique ability to narrow down the cause of each leak, helping developers dramatically reduce OutOfMemoryError crashes.

LeakCanary - A memory leak detection library for Android and Java

JetBrains Mono’s typeface forms are simple and free from unnecessary details. Rendered in small sizes, the text looks crisper. The easier the forms, the faster the eye perceives them and the less effort the brain needs to process them. JetBrains Mono uses a 9° angle of Italic, this maintains the optimal contrast to minimize distraction and eye strain.
 
A ligature is a character consisting of two or more joined symbols. Traditionally, it was introduced as a space-saving technique in printed texts. In code, this technique is adopted to show operators. It has support for 147 languages.

JetBrains Mono’s typeface forms are simple and free from unnecessary details. Rendered in small sizes, the text looks crisper. The easier the forms, the faster the eye perceives them and the less effort the brain needs to process them. JetBrains Mono uses a 9° angle of Italic, this maintains the optimal contrast to minimize distraction and eye strain.

JetBrains Mono – the free and open-source typeface for developers

SQLDelight generates Java models from your SQL CREATE TABLE statements. These models give you a typesafe API to read & write the rows of your tables. It helps you to keep your SQL statements together, organized, and easy to access from Java.To use SQLDelight, put your SQL statements in a .sq file, like src/main/sqldelight/com/example/HockeyPlayer.sq. Typically the first statement creates a table.

SQLDelight generates Java models from your SQL CREATE TABLE statements. These models give you a typesafe API to read & write the rows of your tables. It helps you to keep your SQL statements together, organized, and easy to access from Java. To use SQLDelight, put your SQL statements in a .sq file, like src/main/sqldelight/com/example/HockeyPlayer.sq. Typically the first statement creates a table.

SQLDelight - Generates Java models from CREATE TABLE statements

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

Ebean is fast and simple data access on the JVM. With Ebean it is very easy to insert, update, delete. There is no Session or EntityManager to manage, no merge/flush/attach/detach semantics. Ebean can profile the object graph use and use that to automatically optimise ORM queries such that they only fetch the required properties and minimises N + 1. 
 
Its features include JPA Mapping annotations, Type safe queries, ElasticSearch integration and lot more.

Ebean is fast and simple data access on the JVM.  With Ebean it is very easy to insert, update, delete. There is no Session or EntityManager to manage, no merge/flush/attach/detach semantics.  Ebean can profile the object graph use and use that to automatically optimise ORM queries such that they only fetch the required properties and minimises N + 1. 

Ebean - ORM for Java / Kotlin

Coil is an image loading library for Android backed by Kotlin Coroutines. Coil performs a number of optimizations including memory and disk caching, downsampling the image in memory, re-using bitmaps, automatically pausing/cancelling requests, and more. It adds ~2000 methods to your APK (for apps that already use OkHttp and Coroutines), which is comparable to Picasso and significantly less than Glide and Fresco.



Coil - Image loading for Android backed by Kotlin Coroutines

Javalin is a very lightweight web framework for Kotlin and Java, inspired by Sparkjava and koa.js. Javalin is written in Kotlin with a few functional interfaces written in Java. This was necessary to provide an enjoyable and near identical experience for both Kotlin and Java developers.
<ul>
 <li>Lightweight - You don’t have to learn any advanced concepts to get started</li>
 <li>Consistent API - All handlers and mappers are void and operate on the Context (ctx)</li>
 <li>Almost identical API for both Kotlin and Java</li>
 <li>Not opinionated - A library rather than a framework (you never have to extend anything)</li>
 <li>Fully customizable embedded server (Jetty)</li>
 <li>JSON-object-mapping (via Jackson)</li>
 <li>Simple per-endpoint auth via <code class="highlighter-rouge">AccessManager</code> interface</li>
 <li>Simple static file handling</li>
 <li>Lifecycle events</li>
 <li>CookieStore - An easy way to serialize and store objects in cookies</li>
 <li>Template rendering (Velocity, Freemarker, Thymeleaf, Mustache)</li>
 <li>Markdown rendering</li>
</ul>

Javalin is a very lightweight web framework for Kotlin and Java, inspired by Sparkjava and koa.js. Javalin is written in Kotlin with a few functional interfaces written in Java. This was necessary to provide an enjoyable and near identical experience for both Kotlin and Java developers.

Javalin - A Simple REST API Library for Java / Kotlin

http4k is an HTTP toolkit written in Kotlin that enables the serving and consuming of HTTP services in a functional and consistent way. It consists of a core library http4k-core providing a base HTTP implementation + a number of abstractions for various functionalities (such as servers, clients, templating etc) that are provided as optional add-on libraries.
 
http4k apps can be simply mounted into a running Server, Serverless platform, or compiled to GraalVM and run as a super-lightweight binary. In a single line of code you can switch your server between Java (built-in), Apache, Jetty, Netty, Undertow, Ktor, or Ratpack. In a single line of code you can also switch your client implementation between Java (built-in), Apache, Jetty, and OkHttp.

http4k is an HTTP toolkit written in Kotlin that enables the serving and consuming of HTTP services in a functional and consistent way. It consists of a core library http4k-core providing a base HTTP implementation + a number of abstractions for various functionalities (such as servers, clients, templating etc) that are provided as optional add-on libraries.

http4k - HTTP toolkit written in Kotlin that enables the serving and consuming of HTTP services in a functional and consistent way

Tolgee is a all in one localization solution. You no longer have to worry about choosing the right i18n library, editor, or platform. Tolgee is the only tool you need to translate your web-based project to any language you wish. It can Manage screenshots, Comment on translations, Out of box in-context localization for web, Automated screenshot generation for web.


Tolgee - All in One localization for your project

RSS Parser is an Android library to parse any RSS feed. With RSS Parser, you can fetch plenty of useful information from any RSS channel, be it a blog, magazine, or even a podcast feed. 

RSS Parser -  An Android library to parse a RSS Feed 

<span data-slate-fragment="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">Ostara is a modern tool for managing and monitoring actuator-enabled microservices that aims to make the process more user-friendly and straightforward. Ostara connects to services using the Spring Boot Actuator API. It&rsquo;s a Spring Boot Admin alternative that aims to make the process more user-friendly and simplify the setup process by removing the need for dependencies and changes to your code. It allows you to gain insights into application performance, troubleshoot issues, and perform actions on your services across different environments.
<ul>
<li><span data-slate-fragment="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">Real time status and metrics</li>
<li><span data-slate-fragment="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">Manage log level, Thread dumps, Caches</li>
<li>Bean Dependency Graph</li>
<li>Thread Profiling Tool</li>
</ul>

Ostara is a cross-platform desktop app for managing and monitoring Spring Boot applications using the Actuator API, providing comprehensive insights and effortless control. 

Ostara - Spring Boot Admin

Kobalt is a build system inspired by Gradle and Maven. It reuses the best concepts from these two successful and popular build systems while adding a few modern features of its own. Kobalt is written entirely in Kotlin and its build files are valid Kotlin files as well. 

Kobalt -  A Kotlin-based build system for the JVM

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Corda - Open source blockchain project, designed for business from the start

Ktor - Framework for quickly creating connected applications in Kotlin with minimal effort

Android Components Architecture in a Modular Word

LeakCanary - A memory leak detection library for Android and Java

JetBrains Mono – the free and open-source typeface for developers

SQLDelight - Generates Java models from CREATE TABLE statements

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

Ebean - ORM for Java / Kotlin

Coil - Image loading for Android backed by Kotlin Coroutines

Javalin - A Simple REST API Library for Java / Kotlin

http4k - HTTP toolkit written in Kotlin that enables the serving and consuming of HTTP services in a functional and consistent way

Tolgee - All in One localization for your project

RSS Parser - An Android library to parse a RSS Feed

Ostara - Spring Boot Admin

Kobalt - A Kotlin-based build system for the JVM

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