# Awesome Java A curated list of awesome Java frameworks, libraries and software. Inspired by [awesome-python](https://github.com/vinta/awesome-python). - [Awesome Java](#awesome-java) - [Build Tool](#build-tool) - [Code Analysis](#code-analysis) - [Compiler-compiler](#compiler-compiler) - [Continuous Integration](#continuous-integration) - [Database Access](#database-access) - [Date and Time](#date-and-time) - [Dependency Injection](#dependency-injection) - [Development Tools](#development-tools) - [Distributed Applications](#distributed-applications) - [GUI](#gui) - [Game Development](#game-development) - [High Performance](#high-performance) - [IDE](#ide) - [JVM And JDK](#jvm-and-jdk) - [JSON](#json) - [Logging](#logging) - [Machine Learning](#machine-learning) - [MapReduce](#mapreduce) - [Messaging](#messaging) - [Miscellaneous](#miscellaneous) - [Natural Language Processing](#natural-language-processing) - [ORM](#orm) - [PDF](#pdf) - [Permissions](#permissions) - [Science and Data Analysis](#science-and-data-analysis) - [Server](#server) - [Template Engine](#template-engine) - [Testing](#testing) - [Utility](#utility) - [Web Crawling](#web-crawling) - [Web Frameworks](#web-frameworks) - [REST Frameworks](#rest-frameworks) - [Resources](#resources) - [Twitter](#twitter) - [Websites](#websites) - [Communities](#communities) - [Influental Books](#influental-books) - [Contributing](#contributing) ## Build Tool *Tools which handle the buildcycle of an application* * [Apache Ant](http://ant.apache.org/) - Procedural build configurations via XML files. * [Apache Buildr](http://buildr.apache.org/) - Perform builds using Ruby scripts. * [Apache Maven](http://maven.apache.org/) - Declarative lifecycle and dependency managment which favors conventions. * [Gradle](http://www.gradle.org/) - Incremental builds which are programmed via Groovy. * [sbt](http://www.scala-sbt.org/) - Interactive build tool using Scala. ## Code Analysis *Tools that provide metrics and quality measurements of static code* * [SonarQube](http://www.sonarqube.org/) - Inspection tool for code quality. * [FindBugs](http://findbugs.sourceforge.net/) - Static analysis to find potential bugs. * [Metrics](http://metrics.codahale.com/) ## Compiler-compiler *Tools that create parsers, interpreters or compilers* * [ANTLR](http://www.antlr.org/) * [JavaCC](https://javacc.java.net/) ## Continuous Integration *Tools which support continuously building, testing and releasing applications* * [Hudson](http://jenkins-ci.org/) * [Jenkins](http://jenkins-ci.org/) - Provides server-based CI services, often seen as the successor to Hudson. ## Database Access *Everything which simplifies the access to the database* * [DBeaver](http://dbeaver.jkiss.org/) - Graphical database manager. * [JDBI](http://jdbi.org/) - Simplification of JDBC. * [jOOQ](http://www.jooq.org/) - Generates typesafe code based on SQL schema. * [Liquibase](http://www.liquibase.org/) - Source control for your database. * [Spring JDBCTemplate](http://www.spring.io/) - Simplification of JDBC. * [MapDB](http://www.mapdb.org/) - Database engine with optimized datastructures. ## Date and Time *Libraries related to date and time.* * [Java 8 SE: Date and Time API](http://www.oracle.com/technetwork/articles/java/jf14-date-time-2125367.html) - Incorporates Joda-Time. * [Joda-Time](http://joda-time.sourceforge.net/) - De facto standard date/time-library before Java 8. ## 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. * [Google Guice](http://de.wikipedia.org/wiki/Google_Guice) * [Spring](http://spring.io/) - The Spring Context module provides DI. * [Weld](http://docs.jboss.org/weld/reference/latest/en-US/html_single/) - CDI reference implementation. ## Development Tools * [DCEVM](http://ssw.jku.at/dcevm/) - Modification of the JVM that allows unlimited redefinition of loaded classes at runtime. * [JRebel](http://zeroturnaround.com/software/jrebel/) - Instantly reloads code and configuration changes without redeploys. ## Distributed Applications *Libraries and frameworks used to ease writing distributed and fault-tolerant applications* * [Akka](http://akka.io) - Toolkit and runtime for building highly concurrent, distributed, and fault tolerant event-driven applications on the JVM. * [JGroups](http://www.jgroups.org/) - Toolkit for reliable messaging and creating clusters whose nodes can send messages to each other. * [Apache ZooKeeper](http://zookeeper.apache.org/) - Coordination service. ## GUI *Libraries to create modern graphical user interfaces* * [JavaFX](http://www.oracle.com/technetwork/java/javase/overview/javafx-overview-2158620.html) ## Game Development *Frameworks that support the development of games* * [LWJGL](http://lwjgl.org/) - Robust framework that abstracts libraries like OpenGL/CL/AL. * [libGDX](http://libgdx.badlogicgames.com/) - Allround cross-plattform, high-level framework. ## High Performance *Everything about high performance computation, from collections to specific libraries* * [Trove](http://trove.starlight-systems.com/) - Primitive collections. * [HPPC](http://labs.carrotsearch.com/hppc.html) - Primitive collections. * [Disruptor](http://lmax-exchange.github.io/disruptor/) - Inter-thread messaging library. * [Javalution](http://javolution.org/) - Library for real-time and embedded systems. ## IDE *Integrated development environments that try to simplify several aspects of development* * [NetBeans](https://netbeans.org/) * [Eclipse](http://www.eclipse.org/) * [IntelliJ IDEA](http://www.jetbrains.com/idea/) ## JVM And JDK *Various implementations of the JVM/JDK* * [HotSpot](http://openjdk.java.net/groups/hotspot/) - Official JVM. * [IBM J9](https://www.ibm.com/developerworks/java/jdk/) * [JDK 9](https://jdk9.java.net/) - Early access releases of JDK 9. * [JRockit](http://www.oracle.com/technetwork/middleware/jrockit/overview/index.html) - Originally developed by BEA, has a different kind of GC and is often used with WebLogic. * [OpenJDK](http://openjdk.java.net/) - Open source implementation. ## JSON *Libraries that simplify JSON processing* * [Google Gson](https://code.google.com/p/google-gson/) * [Jackson](http://wiki.fasterxml.com/JacksonHome) ## Logging *Libraries that log the behavior of an application* * [Apache Log4j](http://logging.apache.org/log4j/) * [SLF4J](http://www.slf4j.org/) - Abstraction layer which is to be used with an implementation. * [Logback](http://logback.qos.ch/) ## Machine Learning *Tools that allow to learn from data via a set of specific algorithms* * [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. * [Weka](http://www.cs.waikato.ac.nz/ml/weka/) - Collection of algorithms for data mining tasks ranging from pre-processing to visualization. ## MapReduce *Libraries that provide access to the MapReduce model* * [Apache Crunch](http://crunch.apache.org/) - Framework for simple MapReduce pipelines. * [Apache Hadoop](http://hadoop.apache.org/) - Open-source software framework for storage and large-scale processing of data-sets on clusters of commodity hardware. ## Messaging *Tools that help sending messages between clients to ensure protocol independency* * [Apache ActiveMQ](http://activemq.apache.org/) * [JBoss HornetQ](http://hornetq.jboss.org/) * [Spring AMQP](http://projects.spring.io/spring-amqp/) * [Spring Integration](http://projects.spring.io/spring-integration/) - Enterprise Service Bus. ## Miscellaneous *Everything else* * [Jimfs](https://github.com/google/jimfs) - In-memory file system. * [Lombok](http://projectlombok.org/) - Code-generator which aims to reduce the verbosity of Java. ## Natural Language Processing *Libraries that are specialized on processing text* * [Apache OpenNLP](https://opennlp.apache.org/) Toolkit for common tasks like tokenization. * [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, etc. ## ORM *APIs which handle the persistence of objects* * [EclipseLink](https://www.eclipse.org/eclipselink/) * [Hibernate](http://hibernate.org/orm/) ## 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. * [JasperReports](http://community.jaspersoft.com/project/jasperreports-library) - Complex reporting engine. * [DynamicJasper](http://dynamicjasper.com/) - Simplifies JasperReports. * [DynamicReports](http://dynamicreports.org/) - Simplifies JasperReports. * [iText](http://itextpdf.com/) - Easy to use PDF library but for commercial products you need a license. * [PDF Clown](http://www.stefanochizzolini.it/en/projects/clown/features.html) ## Permissions *Libraries that handle role/rights with associated permissions* * [Apache Shiro](http://shiro.apache.org/) * [Keycloak](http://keycloak.jboss.org/) - Integrated SSO and IDM for browser apps and RESTful web services. * [PicketLink](http://picketlink.org/) - PicketLink is an umbrella project for security and identity management for Java Applications. ## Science and Data Analysis *Libraries for scientific computing and analysis* * [Colt](http://acs.lbl.gov/ACSSoftware/colt/) - High performance scientific and technical computing. * [JTransforms](https://sites.google.com/site/piotrwendykier/software/jtransforms) - Multithread FFT library. * [Mines JTK](http://inside.mines.edu/~dhale/jtk/) - Tools for digital signal processing, linear algebra, inversion, 2-D and 3-D graphics, and more. * [Parallel Colt](https://sites.google.com/site/piotrwendykier/software/parallelcolt) - Multithread high performance scientific and technical computing. ## Server *Servers which are specifically used to deploy applications* * [GlassFish](https://glassfish.java.net/) - Open source reference implementation for Java EE sponsored by Oracle. * [WildFly](http://www.wildfly.org/) - Formerly known as JBoss and developed by Red Hat with extensive Java EE support. * [Jetty](http://www.eclipse.org/jetty/) - Lightweight, small server often embedded in projects. Part of the Eclipse Foundation. * [Apache Tomcat](http://tomcat.apache.org/) - Robust allround server for Servlet and JSP. * [Apache TomEE](http://tomee.apache.org/) - Tomcat plus Java EE. ## Template Engine *Tools which substitute expressions in a template* * JSP * [Apache Tapestry](http://tapestry.apache.org/) * [Apache Velocity](http://velocity.apache.org/) * [Freemarker](http://freemarker.org/) * [Jtwig](http://jtwig.org/) * [Mustache](http://mustache.github.io/) * [Thymeleaf](http://www.thymeleaf.org/) ## 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. * [Mockito](http://code.google.com/p/mockito/) * [Arquillian](http://arquillian.org/) * [Selenium](http://docs.seleniumhq.org/) - Frontend testing. * [VisualVM](http://visualvm.java.net/) * [Eclipse Memory Analyzer Tool](http://www.eclipse.org/mat/) * [Hamcrest](http://hamcrest.org/JavaHamcrest/) - Framework for writing declarative assertion matchers. * [FEST](https://code.google.com/p/fest/) - Collection of testing libraries. * [AssertJ](http://joel-costigliola.github.io/assertj/) - Fluent assertions. * [Calipher](https://code.google.com/p/caliper/) - Microbenchmarking framework. * [JMH](http://openjdk.java.net/projects/code-tools/jmh/) - Microbenchmarking. * [TestNG](http://testng.org/) - Testing framework. * [JUnit](http://junit.org/) - Testing framework. ## Utility *Libraries which provide unspecific functionality, e.g. optimized datastructures* * [Apache Commons](http://commons.apache.org/) * [Google Guava](http://code.google.com/p/guava-libraries/) * [JavaTuples](http://www.javatuples.org/) - Tuples for Java. ## Web Crawling *Libraries that analyze the content of websites* * [Apache Nutch](http://nutch.apache.org/) * [Crawler4j](https://code.google.com/p/crawler4j/) ## Web Frameworks *Frameworks that handle the communication between the layers of an web application* * [Spring](http://projects.spring.io/spring-framework/) * [Grails](https://grails.org/) * [Vaadin](https://vaadin.com/) * [GWT](http://www.gwtproject.org/) * [Apache Wicket](http://wicket.apache.org/) * [Play](http://www.playframework.com/) * [Apache Struts](http://struts.apache.org/) * [PrimeFaces](http://primefaces.org/) * [Spark](http://www.sparkjava.com/why.html) ## 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. # Resources ## Twitter *People to follow* * [Adam Bien](https://twitter.com/AdamBien/) * [Antonio Goncalves](https://twitter.com/agoncal/) * [Arun Gupta](https://twitter.com/arungupta/) * [Ed Burns](https://twitter.com/edburns) * [Java](https://twitter.com/java/) * [Java EE](https://twitter.com/Java_EE/) * [Java.net](https://twitter.com/javanetbuzz/) * [Java Magazine](https://twitter.com/Oraclejavamag) * [Mark Reinhold](https://twitter.com/mreinhold) * [OpenJDK](https://twitter.com/OpenJDK) * [Pete Muir](https://twitter.com/plmuir/) * [Reza Rahman](https://twitter.com/reza_rahman) * [Simon Maple](https://twitter.com/sjmaple) * [Tim Boudreau](https://twitter.com/kablosna) ## Websites *Important websites* * [Java.net](http://java.net/) ## Communities * [r/java](http://www.reddit.com/r/java) - Subreddit for the Java community. ## Influental 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) # Contributing Contributions are very welcome! Please have a look at [CONTRIBUTING](https://github.com/akullpp/awesome-java/blob/master/CONTRIBUTING.md) for guidelines. Topics which have no libraries as of yet are located in [TOPICS](https://github.com/akullpp/awesome-java/blob/master/TOPICS.md).