# Awesome Java A curated list of awesome Java frameworks, libraries and software. Inspired by other [awesome lists](https://github.com/bayandin/awesome-awesomeness). - [Awesome Java](#awesome-java) - [Build Tool](#build-tool) - [Bytecode Manipulation](#bytecode-manipulation) - [Code Analysis](#code-analysis) - [Compiler-compiler](#compiler-compiler) - [Continuous Integration](#continuous-integration) - [Database](#database) - [Date and Time](#date-and-time) - [Dependency Injection](#dependency-injection) - [Development](#development) - [Distributed Applications](#distributed-applications) - [Distribution](#distribution) - [Document Processing](#document-processing) - [Game Development](#game-development) - [GUI](#gui) - [High Performance](#high-performance) - [IDE](#ide) - [Imagery](#imagery) - [JSON](#json) - [JVM and JDK](#jvm-and-jdk) - [Logging](#logging) - [Machine Learning](#machine-learning) - [Messaging](#messaging) - [Miscellaneous](#miscellaneous) - [Natural Language Processing](#natural-language-processing) - [Networking](#networking) - [ORM](#orm) - [PDF](#pdf) - [REST Frameworks](#rest-frameworks) - [Science](#science) - [Search](#search) - [Security](#security) - [Serialization](#serialization) - [Server](#server) - [Template Engine](#template-engine) - [Testing](#testing) - [Utility](#utility) - [Web Crawling](#web-crawling) - [Web Frameworks](#web-frameworks) - [Resources](#resources) - [Communities](#communities) - [Influential Books](#influential-books) - [Podcasts](#podcasts) - [Twitter](#twitter) - [Websites](#websites) - [Contributing](#contributing) ## Build Tool *Tools which handle the buildcycle of an application.* * [Apache Maven](http://maven.apache.org/) - Declarative build and dependency management which favors convention over configuration. It's preferable to Apache Ant which uses a rather procedural approach and can be difficult to maintain. * [Gradle](http://www.gradle.org/) - Incremental builds which are programmed via Groovy instead of declaring XML. Works well with Maven's dependency management and treats Ant scripts as first-class citizens. ## Bytecode Manipulation *Libraries to manipulate Java bytecode programmatically.* * [ASM](http://asm.ow2.org/) - All purpose, low level, bytecode manipulation and analysis. * [Javassist](http://www.csg.ci.i.u-tokyo.ac.jp/~chiba/javassist/) - Tries to simplify the editing of bytecode. * [Byte Buddy](http://bytebuddy.net/) - Further simplifies bytecode generation with a fluent API. ## Code Analysis *Tools that provide metrics and quality measurements.* * [Checkstyle](http://checkstyle.sourceforge.net/) - Static analysis of coding conventions and standards. * [FindBugs](http://findbugs.sourceforge.net/) - Static analysis of bytecode to find potential bugs. * [PMD](http://pmd.sourceforge.net/) - Source code analysis of bad coding practices. * [SonarQube](http://www.sonarqube.org/) - Integrates other analysis components via plugins and provides an overview of the metrics over time. ## Compiler-compiler *Frameworks that help to create parsers, interpreters or compilers.* * [ANTLR](http://www.antlr.org/) - Complex full-featured framework for top-down parsing. * [JavaCC](https://javacc.java.net/) - More specific and slightly easier to learn. Has syntactic lookahead. ## Continuous Integration *Tools which support continuously building, testing and releasing applications.* * [Bamboo](https://www.atlassian.com/software/bamboo) - Atlassian's CI solution with good integration of other products. * [CircleCI](https://circleci.com/) - Hosted service with a free trial. * [Codeship](https://www.codeship.io/features) - Hosted services with a limited free plan. * [Go](http://www.thoughtworks.com/products/go-continuous-delivery) - ThoughtWork's CI open source solution. * [Jenkins](http://jenkins-ci.org/) - Provides server-based deployment services. * [TeamCity](http://www.jetbrains.com/teamcity/) - JetBrain's CI solution with a free version. * [Travis](https://travis-ci.org) - Hosted service often used for open source projects. ## Database *Everything which simplifies interactions with the database.* * [Flyway](http://flywaydb.org/) - Simple database migration with Java API. * [H2](http://h2database.com/) - Small SQL Database notable for its in-memory functionality. * [JDBI](http://jdbi.org/) - Convenient abstraction of JDBC. * [jOOQ](http://www.jooq.org/) - Generates typesafe code based on SQL schema. * [Presto](https://github.com/facebook/presto) - Distributed SQL query engine for big data. * [Querydsl](http://www.querydsl.com/) - Typesafe unified queries for Java. ## Date and Time *Libraries related to handling date and time.* * [Joda-Time](http://www.joda.org/joda-time/) - De facto standard date/time-library before Java 8. * [Time4J](https://github.com/MenoData/Time4J) - Advanced date and time library for Java. ## Dependency Injection *Libraries that help to realize the [Inversion of Control](http://en.wikipedia.org/wiki/Inversion_of_control) paradigm.* * [Dagger](http://square.github.io/dagger/) - Compile-time injection framework without reflection, mainly for Android. * [Guice](https://github.com/google/guice) - Lightweight but powerful framework that completes Dagger. ## Development *Augmentation of the development process at a fundamental level.* * [AspectJ](https://eclipse.org/aspectj/) - Seamless aspect-oriented programming extension. * [Auto](https://github.com/google/auto) - Collection of source code generators. * [DCEVM](http://ssw.jku.at/dcevm/) - Modification of the JVM that allows unlimited redefinition of loaded classes at runtime. OpenJDK 7/8 are supported by [this fork](http://dcevm.github.io/). * [JRebel](http://zeroturnaround.com/software/jrebel/) - Commercial software that instantly reloads code and configuration changes without redeploys. * [Lombok](http://projectlombok.org/) - Code-generator which aims to reduce the verbosity of Java. * [RxJava](https://github.com/Netflix/RxJava) - Library for composing asynchronous and event-based programs using observable sequences from the JVM. * [Spring Loaded](https://github.com/spring-projects/spring-loaded) - Another class reloading agent for the JVM. * [vert.x](http://vertx.io/) - Polyglot event-driven application framework for the JVM. ## Distributed Applications *Libraries and frameworks for writing distributed and fault-tolerant applications.* * [Akka](http://akka.io) - Toolkit and runtime for building concurrent, distributed, and fault tolerant event-driven applications. * [Apache Storm](http://storm.incubator.apache.org/) - Distributed realtime computation system. * [Apache ZooKeeper](http://zookeeper.apache.org/) - Coordination service with distributed configuration, synchronization, and naming registry for large distributed systems. * [Hazelcast](http://hazelcast.org/) - Distributed and highly scalable in-memory datagrid. * [Hystrix](https://github.com/Netflix/Hystrix) - Latency and Fault Tolerance for Distributed Systems. * [JGroups](http://www.jgroups.org/) - Toolkit for reliable messaging and creating clusters whose nodes can send messages to each other. * [Quasar](http://www.paralleluniverse.co/quasar/) - Lightweight threads and actors for the JVM. ## Distribution *Tools which handle the distribution of Java applications in native formats.* * [Bintray](https://bintray.com/) - Version control for your binaries which handles the publishing. Can also be used with Maven or Gradle. * [IzPack](http://izpack.org/) - Setup authoring tool for cross-platform deployments. * [Launch4j](http://launch4j.sourceforge.net/) - Wraps JARs in lightweight and native Windows executables. * [packr](https://github.com/libgdx/packr#packr) - Packs your JAR, assets and JVM for native distribution on Windows, Linux and Mac OS X. ## Document Processing *Libraries that assist with processing office document formats.* * [Apache POI](http://poi.apache.org/) - Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT). * [jOpenDocument](http://www.jopendocument.org/) - Processes the OpenDocument format. ## Game Development *Frameworks that support the development of games.* * [jMonkeyEngine](http://jmonkeyengine.org/) - Game engine for modern 3D development. * [libGDX](http://libgdx.badlogicgames.com/) - All-round cross-platform, high-level framework. * [LWJGL](http://lwjgl.org/) - Robust framework that abstracts libraries like OpenGL/CL/AL. ## GUI *Libraries to create modern graphical user interfaces.* * [JavaFX](http://www.oracle.com/technetwork/java/javase/overview/javafx-overview-2158620.html) - The successor of Swing. * [Scene Builder](http://www.oracle.com/technetwork/java/javase/downloads/javafxscenebuilder-info-2157684.html) - Visual layout tool for JavaFX applications. ## High Performance *Everything about high performance computation, from collections to specific libraries.* * [Disruptor](http://lmax-exchange.github.io/disruptor/) - Inter-thread messaging library. * [fastutil](http://fastutil.di.unimi.it/) - Fast and compact type-specific collections for Java. * [GS Collections](https://github.com/goldmansachs/gs-collections) - Collection framework inspired by Smalltalk. * [hftc](https://github.com/OpenHFT/hftc) - Hash sets and hash maps. * [HPPC](http://labs.carrotsearch.com/hppc.html) - Primitive collections. * [Javolution](http://javolution.org/) - Library for real-time and embedded systems. * [Trove](http://trove.starlight-systems.com/) - Primitive collections. ## IDE *Integrated development environments that try to simplify several aspects of development.* * [Eclipse](http://www.eclipse.org/) - Does a lot of things in the background. Noteworthy are its large amount of plugins. * [IntelliJ IDEA](http://www.jetbrains.com/idea/) - Supports a lot of JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector. * [NetBeans](https://netbeans.org/) - Provides integration for several Java SE and EE features starting with database access and servers to HTML5 and AngularJS. ## Imagery *Libraries that assist with the creation, evaluation or manipulation of graphical images.* * [Picasso](http://square.github.io/picasso/) - Image downloading and caching library for Android. * [ZXing](https://github.com/zxing/zxing) - Multi-format 1D/2D barcode image processing library. ## JSON *Libraries that simplify JSON processing.* * [Gson](https://code.google.com/p/google-gson/) - Serializes Java objects to JSON and vice versa. Good performance with on-the-fly usage. * [Jackson](http://wiki.fasterxml.com/JacksonHome) - Similar to GSON but has performance gains if you need to instantiate the library more often. ## JVM and JDK *Current implementations of the JVM/JDK.* * [JDK 9](https://jdk9.java.net/) - Early access releases of JDK 9. * [OpenJDK](http://openjdk.java.net/) - Open source implementation. ## Logging *Libraries that log the behavior of an application.* * [Apache Log4j 2](http://logging.apache.org/log4j/) - Complete rewrite of the previous version. Now has a powerful plugin and configuration architecture. * [kibana](http://www.elasticsearch.org/overview/kibana/) - Analyzes and visualizes log files. * [Logback](http://logback.qos.ch/) - Founded by the same developer as Log4j and proves to be a robust logging library with interesting configuration options via Groovy. * [logstash](http://logstash.net/) - Tool for managing log files. * [SLF4J](http://www.slf4j.org/) - Abstraction layer which is to be used with an implementation. ## Machine Learning *Tools that provide specific statistical algorithms which allow to learn from data.* * [Apache Hadoop](http://hadoop.apache.org/) - Open-source software framework for storage and large-scale processing of data-sets on clusters of commodity hardware. * [Apache Mahout](https://mahout.apache.org/) - Scalable algorithms focused on collaborative filtering, clustering and classification. * [Apache Spark](http://spark.apache.org/) - Open-source data analytics cluster computing framework. * [h2o](http://0xdata.github.io/h2o/) - Analytics engine for statistics over big data. * [Weka](http://www.cs.waikato.ac.nz/ml/weka/) - Collection of algorithms for data mining tasks ranging from pre-processing to visualization. ## Messaging *Tools that help sending messages between clients to ensure protocol independency.* * [Apache ActiveMQ](http://activemq.apache.org/) - Open-source message broker that implements JMS and converts synchronous to asynchronous communication. * [Apache Kafka](http://kafka.apache.org/) - High-throughput distributed messaging system. * [JBoss HornetQ](http://hornetq.jboss.org/) - Clear, concise, modular and made to be embedded. * [JeroMQ](https://github.com/zeromq/jeromq) - Pure Java implementation of ZeroMQ. ## Miscellaneous *Everything else.* * [Design Patterns](https://github.com/iluwatar/java-design-patterns) - Implementation and explanation of the most common design patterns. * [Jimfs](https://github.com/google/jimfs) - In-memory file system. * [Lanterna](https://code.google.com/p/lanterna/) - Easy console text GUI library similar to curses. * [LightAdmin](http://lightadmin.org/) - Pluggable CRUD UI library for rapid application development. * [Metrics](http://metrics.codahale.com/) - Create your own metrics or add them for supported frameworks, then expose them via JMX or HTTP, or send them to a database. * [OpenRefine](http://openrefine.org/) - Tool for working with messy data: cleaning, transforming, extending it with web services and linking it to databases. * [RoboVM](http://www.robovm.org/) - Write native iOS apps in Java. ## Natural Language Processing *Libraries that specialize on processing text.* * [Apache OpenNLP](https://opennlp.apache.org/) - Toolkit for common tasks like tokenization. * [CoreNLP](http://nlp.stanford.edu/software/corenlp.shtml) - Stanford's CoreNLP provides a set of fundamental tools for tasks like tagging, named entity recognition, sentiment analysis and many more. * [LingPipe](http://alias-i.com/lingpipe/) - Toolkit for a variety of tasks ranging from POS tagging to sentiment analysis. * [Mallet](http://mallet.cs.umass.edu/) - Statistical natural language processing, document classification, clustering, topic modeling and more. ## Networking *Libraries for network programming.* * [Netty](http://netty.io/) - A framework for building high performance network applications. * [OkHttp](http://square.github.io/okhttp/) - An HTTP+SPDY client for Android and Java applications. ## ORM *APIs which handle the persistence of objects.* * [EclipseLink](https://www.eclipse.org/eclipselink/) - Supports a number of persistence standards: JPA, JAXB, JCA and SDO. * [Hibernate](http://hibernate.org/orm/) - Robust and widely used with an active community. * [Ebean](http://ebean-orm.github.io/) - ORM Framework that provides fast data access and even faster coding. ## PDF *Everything that helps with the creation of PDF files.* * [Apache FOP](http://xmlgraphics.apache.org/fop/) - Creates PDF from XSL-FO. * [Apache PDFBox](http://pdfbox.apache.org/) - Toolbox for creating and manipulating PDF. * [DynamicReports](http://dynamicreports.org/) - Simplifies JasperReports. * [iText](http://itextpdf.com/) - Easy to use PDF library which creates PDF files programmatically but requires a license for commercial purposes. * [JasperReports](http://community.jaspersoft.com/project/jasperreports-library) - Complex reporting engine. ## REST Frameworks *Frameworks specifically for creating RESTful services.* * [Dropwizard](https://dropwizard.github.io/dropwizard/) - Opinionated framework for setting up modern web applications, includes Jetty, Jackson, Jersey and Metrics. * [Jersey](https://jersey.java.net/) - JAX-RS reference implementation. * [RESTEasy](http://resteasy.jboss.org/) - Fully certified and portable implementation of the JAX-RS specification. * [Retrofit](http://square.github.io/retrofit/) - A type-safe REST client for Java. * [Spark](http://www.sparkjava.com/) - A Sinatra inspired framework for java. * [Swagger](https://helloreverb.com/developers/swagger) - Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services. ## Science *Libraries for scientific computing and analysis.* * [SCaVis](http://jwork.org/scavis/) - Environment for scientific computation, data analysis and data visualization. ## Search *Engines which index documents for search and analysis.* * [Apache Solr](http://lucene.apache.org/solr/) - Full enterprise search engine optimized for high volume traffic. * [Elasticsearch](http://www.elasticsearch.org/) - Distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents. ## Security *Libraries that handle security, authentication, authorization or session management.* * [Apache Shiro](http://shiro.apache.org/) - Performs authentication, authorization, cryptography and session management. * [Cryptomator](http://cryptomator.org/) - Multiplatform transparent client-side encryption of files in the cloud. * [Keycloak](http://keycloak.jboss.org/) - Integrated SSO and IDM for browser apps and RESTful web services. Currently in beta but looks very promising. * [PicketLink](http://picketlink.org/) - PicketLink is an umbrella project for security and identity management for Java applications. * [Spring Security](http://projects.spring.io/spring-security/) - Focuses on authentication/authorization and protects against several attack vectors. ## Serialization *Libraries that handle serialization with high efficiency.* * [FlatBuffers](https://github.com/google/flatbuffers) - Memory efficient serialization library that can access serialized data without unpacking and parsing it. * [Kryo](https://github.com/EsotericSoftware/kryo) - Fast and efficient object graph serialization framework. * [MessagePack](https://github.com/msgpack/msgpack-java) - Efficient binary serialization format. ## Server *Servers which are specifically used to deploy applications.* * [Apache Tomcat](http://tomcat.apache.org/) - Robust all-round server for Servlet and JSP. * [Apache TomEE](http://tomee.apache.org/) - Tomcat plus Java EE. * [GlassFish](https://glassfish.java.net/) - Open source reference implementation for Java EE sponsored by Oracle. * [Jetty](http://www.eclipse.org/jetty/) - Lightweight, small server, often embedded in projects. * [WildFly](http://www.wildfly.org/) - Formerly known as JBoss and developed by Red Hat with extensive Java EE support. ## Template Engine *Tools which substitute expressions in a template.* * [Apache Velocity](http://velocity.apache.org/) - Templates for HTML pages, emails or source code generation in general. * [FreeMarker](http://freemarker.org/) - General templating engine without any heavyweight or opinionated dependencies. * [Handlebars.java](http://jknack.github.io/handlebars.java/) - Logic-less and semantic Mustache templates with Java. * [JavaServer Pages](https://jsp.java.net/) - Common templating for websites with custom tag libraries. * [Thymeleaf](http://www.thymeleaf.org/) - Aims to be a substitute for JSP and works for XML files in general. ## Testing *Tools that test from object to interface level including performance and other benchmarks.* * [Apache JMeter](http://jmeter.apache.org/) - Functional testing and performance measurements. * [Arquillian](http://arquillian.org/) - Integration and functional testing platform with integration of Java EE containers. * [AssertJ](http://joel-costigliola.github.io/assertj/) - Fluent assertions that improve readability. * [JMH](http://openjdk.java.net/projects/code-tools/jmh/) - Microbenchmarking tool for the JVM. * [JUnit](http://junit.org/) - Common testing framework. * [Mockito](http://code.google.com/p/mockito/) - Creation of test double objects in automated unit tests for the purpose of TDD or BDD. * [Selenium](http://docs.seleniumhq.org/) - Portable software testing framework for web applications. * [Selenide](http://selenide.org/) - Concise API around Selenium to write stable and readable UI tests. * [TestNG](http://testng.org/) - Testing framework. * [VisualVM](http://visualvm.java.net/) - Visual interface for detailed information about running applications. ## Utility *Libraries which provide general utility functions.* * [Apache Commons](http://commons.apache.org/) - Provides different general purpose functions like configuration, validation, collections, file upload or XML processing. * [Guava](http://code.google.com/p/guava-libraries/) - Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth. * [javatuples](http://www.javatuples.org/) - Does what it says, although the concept of tuples in general is debatable. ## Web Crawling *Libraries that analyze the content of websites.* * [Apache Nutch](http://nutch.apache.org/) - Highly extensible, highly scalable Web crawler for production environment. * [Crawler4j](https://code.google.com/p/crawler4j/) - Simple lightweight alternative. * [JSoup](http://jsoup.org/) - Scrapes, parses, manipulates and cleans HTML. ## Web Frameworks *Frameworks that handle the communication between the layers of an web application.* h * [Apache Tapestry](http://tapestry.apache.org/) - Component oriented framework for creating dynamic, robust, highly scalable web applications in Java. * [Apache Wicket](http://wicket.apache.org/) - Component-based web application framework similar to Tapestry with a stateful GUI. * [Google Web Toolkit](http://www.gwtproject.org/) - Toolbox which includes a Java-to-JavaScript compiler for client-side code, XML parser, API for RPC, JUnit integration, internationalization support and widgets for the GUI. * [Grails](https://grails.org/) - Groovy framework with the aim to provide a highly productive environment by favoring convention over configuration, no XML and support for mixins. * [Play](http://www.playframework.com/) - Uses convention over configuration, hot code reloading and display of errors in the browser. * [PrimeFaces](http://primefaces.org/) - JSF framework which has a free and a commercial version with support. Provides several frontend components. * [Spring Boot](http://projects.spring.io/spring-boot/) - Microframework which simplifies the development of new Spring applications. * [Spring](http://projects.spring.io/spring-framework/) - Aims to simplify the development with Java EE and provides packages for dependency injection and aspect-oriented programming. * [Vaadin](https://vaadin.com/) - Event-driven framework build on top of GWT. Uses server-side architecture with Ajax on the client-side. * [Ninja](http://www.ninjaframework.org/) - Full stack web framework for Java. Rock solid, fast and super productive. * [Ratpack](http://www.ratpack.io/) - A set of Java libraries that facilitate fast, efficient, evolvable and well tested HTTP applications. # Resources ## Communities *Active discussions.* * [r/java](http://www.reddit.com/r/java) - Subreddit for the Java community. * [stackoverflow](http://stackoverflow.com/questions/tagged/java) - Question/answer platform. ## Influential Books *Books about Java that had a high impact and are still worth reading.* * [Effective Java (2nd Edition)](http://www.amazon.com/Effective-Java-Edition-Joshua-Bloch/dp/0321356683) * [Java Concurrency in Practice](http://www.amazon.com/Java-Concurrency-Practice-Brian-Goetz/dp/0321349601) * [Thinking in Java](http://www.amazon.com/Thinking-Java-Edition-Bruce-Eckel/dp/0131872486) ## Podcasts *Something to listen to while programming.* * [The Java Posse](http://www.javaposse.com/) ## Twitter *Active accounts to follow.* * [Adam Bien](https://twitter.com/AdamBien/) - Freelancer: Author, JavaONE Rockstar Speaker, Consultant, Java Champion. * [Antonio Goncalves](https://twitter.com/agoncal/) - Java Champion, JUG Leader, Devoxx France, Java EE 6/7, JCP, Author. * [Arun Gupta](https://twitter.com/arungupta/) - Java Champion, JavaOne Rockstar, UG Leader, Devoxx4Kids-er, Red Hatter. * [Bruno Borges](https://twitter.com/brunoborges) - Product Manager/Java Jock at Oracle. * [Ed Burns](https://twitter.com/edburns) - Consulting Member of the Technical Staff at Oracle. * [Eugen Paraschiv](https://twitter.com/baeldung) - Author of the Spring Security Course. * [James Weaver](https://twitter.com/JavaFXpert) - Java/JavaFX/IoT developer, author and speaker. * [Java EE](https://twitter.com/Java_EE/) - Official Java EE Twitter account. * [Java Magazine](https://twitter.com/Oraclejavamag) - Official Java Magazine account. * [Java.net](https://twitter.com/javanetbuzz/) - Official Java.net account. * [Java](https://twitter.com/java/) - Official Java Twitter account. * [Javin Paul](https://twitter.com/javinpaul) - Well-known Java blogger. * [Lukas Eder](https://twitter.com/lukaseder) - Founder and CEO Data Geekery (jOOQ). * [Mario Fusco](https://twitter.com/mariofusco) - RedHatter, JUG coordinator, frequent speaker and author. * [Mark Reinhold](https://twitter.com/mreinhold) - Chief Architect, Java Platform Group, Oracle. * [Martijn Verburg](https://twitter.com/karianna) - London JUG co-leader, speaker, author, Java Champion and much more. * [OpenJDK](https://twitter.com/OpenJDK) - Official OpenJDK account. * [Reza Rahman](https://twitter.com/reza_rahman) - Java EE/GlassFish/WebLogic evangelist, author, speaker, open source hacker. * [Simon Maple](https://twitter.com/sjmaple) - Java Champion, virtualJUG founder, LJC leader, RebelLabs author. * [Stephen Colebourne](https://twitter.com/jodastephen) - Java Champion, speaker. * [Tim Boudreau](https://twitter.com/kablosna) - Author and NetBeans guru. * [Trisha Gee](https://twitter.com/trisha_gee) - Java Champion and speaker. ## Websites *Sites to read.* * [Google Java Style](http://google-styleguide.googlecode.com/svn/trunk/javaguide.html) * [InfoQ](http://www.infoq.com/) * [Java Code Geeks](http://www.javacodegeeks.com/) * [Java.net](http://java.net/) * [Javalobby](http://java.dzone.com/) * [JavaWorld](http://www.javaworld.com/) * [RebelLabs](http://zeroturnaround.com/rebellabs/) * [The Java Specialist' Newsletter](http://www.javaspecialists.eu/archive/archive.jsp) * [TheServerSide.com](http://www.theserverside.com/) * [Thoughts On Java](http://www.thoughts-on-java.org/) # Contributing Contributions are very welcome! Please have a look at [CONTRIBUTING](https://github.com/akullpp/awesome-java/blob/master/CONTRIBUTING.md) for guidelines.