Many major open source projects are hosted at the Apache Software Foundation, meaning that while they have governance defined by the Apache Way, and report to the ASF board, the projects themselves are not independent legal entities.

Apache Software Foundation Subprojects

---

• Apache Accumulo

  http://accumulo.apache.org/
  Sorted, distributed key/value store

• Apache ActiveMQ

  http://activemq.apache.org/
  Distributed Messaging System

• Apache AGE

  http://age.apache.org
  a multi-model database that enables graph and relational models built on PostgreSQL

• Apache Airavata

  http://airavata.apache.org/
  Workflow and Computational Job Management Middleware

• Apache Airflow

  http://airflow.apache.org/
  workflow automation and scheduling that can be used to author and manage data pipelines

• Apache Allura

  http://allura.apache.org/
  Forge software for hosting software projects

• Apache Ambari

  http://ambari.apache.org/
  Hadoop cluster management

• Apache Ant

  http://ant.apache.org/
  Java-based build tool

• Apache Any23

  http://any23.apache.org/
  Anything to Triples

• Apache APISIX

  http://apisix.apache.org
  a cloud-native microservices API gateway

• Apache Archiva

  http://archiva.apache.org/
  Build Artifact Repository Manager

• Apache Aries

  http://aries.apache.org/
  Enterprise OSGi application programming model

• Apache Arrow

  http://arrow.apache.org/
  Powering Columnar In-Memory Analytics

• Apache AsterixDB

  http://asterixdb.apache.org/
  open source Big Data Management System

• Apache Atlas

  http://atlas.apache.org/
  scalable and extensible set of core foundational governance services

• Apache Attic

  http://attic.apache.org/
  A home for dormant projects

• Apache Avro

  http://avro.apache.org/
  A Serialization System

• Apache Axis

  http://axis.apache.org/
  Java SOAP Engine

• Apache Bahir

  http://bahir.apache.org/
  Extensions to distributed analytic platforms such as Apache Spark

• Apache Beam

  http://beam.apache.org/
  Programming model, SDKs, and runners for defining and executing data processing pipelines

• Apache Bigtop

  http://bigtop.apache.org/
  Apache Hadoop ecosystem integration and distribution project

• Apache Bloodhound

  http://bloodhound.apache.org/
  Issue tracking, wiki and repository browser

• Apache BookKeeper

  http://bookkeeper.apache.org/
  Replicated log service which can be used to build replicated state machines

• Apache Brooklyn

  http://brooklyn.apache.org/
  Framework for modeling, monitoring, and managing applications through autonomic blueprints

• Apache bRPC

  http://brpc.apache.org
  an industrial-grade RPC framework for building reliable and high-performance services

• Apache BuildStream

  http://buildstream.apache.org
  efficiently and correctly developing, building and integrating software stacks

• Apache BVal

  http://bval.apache.org/
  JSR-303 Bean Validation Implementation and Extensions

• Apache Calcite

  http://calcite.apache.org/
  Dynamic data management framework

• Apache Camel

  http://camel.apache.org/
  Spring based Integration Framework which implements the Enterprise Integration Patterns

• Apache CarbonData

  http://carbondata.apache.org/
  indexed columnar data format for fast analytics on big data platform

• Apache Cassandra

  http://cassandra.apache.org/
  Highly scalable second-generation distributed database

• Apache Causeway

  http://causeway.apache.org/
  Framework for rapidly developing domain-driven apps in Java

• Apache Cayenne

  http://cayenne.apache.org/
  User-friendly Java ORM with Tools

• Apache Celix

  http://celix.apache.org/
  Implementation of the OSGi specification adapted to C

• Apache CloudStack

  http://cloudstack.apache.org/
  Infrastructure as a Service solution

• Apache Cocoon

  http://cocoon.apache.org/
  Web development framework: separation of concerns, component-based

• Apache Commons

  http://commons.apache.org/
  Reusable Java components

• Apache Community Development

  http://community.apache.org/
  Resources to help people become involved with Apache projects

• Apache Cordova

  http://cordova.apache.org/
  Platform for building native mobile applications using HTML, CSS and JavaScript

• Apache CouchDB

  http://couchdb.apache.org/
  RESTful document database

• Apache Creadur

  http://creadur.apache.org/
  Comprehension and auditing of software distributions

• Apache cTAKES

  http://ctakes.apache.org/
  Natural language processing (NLP) tool for information extraction from electronic medical record clinical free-text

• Apache Curator

  http://curator.apache.org/
  Java libraries that make using Apache ZooKeeper easier

• Apache CXF

  http://cxf.apache.org/
  Service Framework

• Apache Daffodil

  http://daffodil.apache.org
  an implementation of the Data Format Description Language (DFDL) used to convert between fixed format data and more readily processed forms such as XML or JSON

• Apache DataFu

  http://datafu.apache.org/
  well-tested libraries that help developers solve common data problems in Hadoop and similar distributed systems

• Apache DataSketches

  http://datasketches.apache.org
  an open source, high-performance library of streaming algorithms commonly called "sketches" in the data sciences. Sketches are small, stateful programs that process massive data as a stream and can provide approximate answers, with mathematical guarantees, to computationally difficult queries orders-of-magnitude faster than traditional, exact methods

• Apache DB

  http://db.apache.org/
  Database access

• Apache DeltaSpike

  http://deltaspike.apache.org/
  Portable CDI extensions that provide useful features for Java application developers

• Apache Directory

  http://directory.apache.org/
  Apache Directory Server

• Apache DolphinScheduler

  http://dolphinscheduler.apache.org
  a distributed and extensible workflow scheduler platform with powerful DAG visual interfaces

• Apache Doris

  http://doris.apache.org
  a MPP-based interactive SQL data warehousing for reporting and analysis

• Apache Drill

  http://drill.apache.org/
  Schema-free SQL Query Engine for Apache Hadoop, NoSQL and Cloud Storage

• Apache Druid

  http://druid.apache.org
  analytical database software

• Apache Dubbo

  http://dubbo.apache.org/
  a high-performance, lightweight, java based RPC framework.

• Apache ECharts

  http://echarts.apache.org
  a charting and data visualization library written in JavaScript

• Apache Empire-db

  http://empire-db.apache.org/
  Relational Data Persistence

• Apache EventMesh

  http://eventmesh.apache.org
  a fully serverless platform used to build distributed event-driven applications

• Apache Felix

  http://felix.apache.org/
  OSGi Framework and components.

• Apache Fineract

  http://fineract.apache.org/
  Platform for Digital Financial Services

• Apache Flagon

  http://flagon.apache.org
  thin-client behavioral logging capability useful for business analytics, usage analytics, usability and user testing

• Apache Flex

  http://flex.apache.org/
  Application framework for expressive web applications that deploy to all major browsers, desktops and devices.

• Apache Flink

  http://flink.apache.org/
  platform for scalable batch and stream data processing

• Apache Flume

  http://flume.apache.org/
  A reliable service for efficiently collecting, aggregating, and moving large amounts of log data

• Apache Fluo

  http://fluo.apache.org/
  Storage and incremental processing of large data sets

• Apache FreeMarker

  http://freemarker.apache.org/
  a template engine.

• Apache Geode

  http://geode.apache.org/
  Low latency, high concurrency data management solutions

• Apache Geronimo

  http://geronimo.apache.org/
  Java2, Enterprise Edition (J2EE) container

• Apache Giraph

  http://giraph.apache.org/
  Iterative graph processing system built for high scalability

• Apache Gobblin

  http://gobblin.apache.org
  a distributed data integration framework that simplifies common aspects of big data integration such as data ingestion, replication, organization and lifecycle management for both streaming and batch data ecosystems

• Apache Gora

  http://gora.apache.org/
  ORM framework for column stores such as Apache HBase and Apache Cassandra with a specific focus on Hadoop

• Apache Griffin

  http://griffin.apache.org/
  a data quality solution for big data, including both streaming and batch mode. It offers an unified process to measure data quality from different perspectives.

• Apache Groovy

  http://groovy.apache.org/
  A multi-faceted language for the Java platform

• Apache Guacamole

  http://guacamole.apache.org/
  providing performant, browser-based remote access

• Apache Gump

  http://gump.apache.org/
  Continuous integration of open source projects

• Apache Hadoop

  http://hadoop.apache.org/
  Distributed computing platform

• Apache HAWQ

  http://hawq.apache.org/
  a Hadoop native SQL query engine that combines the key technological advantages of an MPP database with the scalability and convenience of Hadoop

• Apache HBase

  http://hbase.apache.org/
  Apache Hadoop Database

• Apache Helix

  http://helix.apache.org/
  A cluster management framework for partitioned and replicated distributed resources

• Apache Hive

  http://hive.apache.org/
  Data warehouse infrastructure using the Apache Hadoop Database

• Apache Hop

  http://hop.apache.org
  a platform for data orchestration

• Apache HTTP Server

  http://httpd.apache.org/
  Apache Web Server (httpd)

• Apache HttpComponents

  http://hc.apache.org/
  Java toolset of low level HTTP components

• Apache Hudi

  http://hudi.apache.org
  providing atomic upserts and incremental data streams on Big Data

• Apache Iceberg

  http://iceberg.apache.org
  managing huge analytic datasets using a standard at-rest table format that is designed for high performance and ease of use

• Apache Ignite

  http://ignite.apache.org/
  High-performance, integrated and distributed in-memory platform for computing and transacting on large-scale data sets in real-time

• Apache Impala

  http://impala.apache.org/
  a high-performance distributed SQL engine

• Apache Incubator

  http://incubator.apache.org/
  Entry path for projects and codebases wishing to become part of the Foundation's efforts

• Apache InLong

  http://inlong.apache.org
  a one-stop data integration framework that provides automatic, secure, and reliable data transmission capabilities. InLong supports both batch and stream data processing at the same time, which offers great power to build data analysis, modeling, and other real-time applications based on streaming data

• Apache IoTDB

  http://iotdb.apache.org
  an IoT native database with high performance for data management and analysis

• Apache Jackrabbit

  http://jackrabbit.apache.org/
  Content Repository for Java

• Apache James

  http://james.apache.org/
  Java Apache Mail Enterprise Server

• Apache jclouds

  http://jclouds.apache.org/
  Java cloud APIs and abstractions

• Apache Jena

  http://jena.apache.org/
  Java framework for building Semantic Web applications

• Apache JMeter

  http://jmeter.apache.org/
  Java performance and functional testing

• Apache Johnzon

  http://johnzon.apache.org/
  JSR-353 compliant JSON parsing; modules to help with JSR-353 as well as JSR-374 and JSR-367

• Apache JSPWiki

  http://jspwiki.apache.org/
  Leading open source WikiWiki engine, feature-rich and built around standard J2EE components (Java, servlets, JSP)

• Apache Juneau

  http://juneau.apache.org/
  a toolkit for marshalling POJOs to a wide variety of content types using a common framework, and for creating sophisticated self-documenting REST interfaces and microservices using VERY little code

• Apache Kafka

  http://kafka.apache.org/
  Distributed publish-subscribe messaging system

• Apache Karaf

  http://karaf.apache.org/
  Server-side OSGi distribution

• Apache Kibble

  http://kibble.apache.org/
  an interactive project activity analyzer and aggregator

• Apache Knox

  http://knox.apache.org/
  Simplify and normalize the deployment and implementation of secure Hadoop clusters

• Apache Kudu

  http://kudu.apache.org/
  A distributed columnar storage engine built for the Apache Hadoop ecosystem

• Apache Kylin

  http://kylin.apache.org/
  Extreme OLAP Engine for Big Data

• Apache Kyuubi

  http://kyuubi.apache.org
  a distributed and multi-tenant gateway to provide serverless SQL on data warehouses and lakehouses

• Apache Libcloud

  http://libcloud.apache.org/
  Unified interface to the cloud

• Apache Linkis

  http://linkis.apache.org
  a distributed computation middleware to facilitate connection, governance and orchestration between the upper applications and the underlying data engines

• Apache Logging Services

  http://logging.apache.org/
  Cross-language logging services

• Apache Lucene

  http://lucene.apache.org/
  Search engine library

• Apache Lucene.Net

  http://lucenenet.apache.org/
  Search engine library targeted at .NET runtime users.

• Apache MADlib

  http://madlib.apache.org/
  Scalable, Big Data, SQL-driven machine learning framework for Data Scientists

• Apache Mahout

  http://mahout.apache.org/
  Scalable machine learning library

• Apache ManifoldCF

  http://manifoldcf.apache.org/
  Framework for connecting source content repositories to target repositories or indexes.

• Apache Maven

  http://maven.apache.org/
  Java project management and comprehension tools

• Apache Mesos

  http://mesos.apache.org/
  a cluster manager that provides efficient resource isolation and sharing across distributed applications

• Apache MINA

  http://mina.apache.org/
  Multipurpose Infrastructure for Network Application

• Apache Mnemonic

  http://mnemonic.apache.org/
  a transparent nonvolatile hybrid memory oriented library for Big data, High-performance computing, and Analytics

• Apache MXNet

  http://mxnet.apache.org
  a flexible and efficient library for Deep Learning

• Apache MyFaces

  http://myfaces.apache.org/
  JavaServer(tm) Faces implementation and components

• Apache Mynewt

  http://mynewt.apache.org/
  embedded OS optimized for networking and built for remote management of constrained devices

• Apache NetBeans

  http://netbeans.apache.org/
  development environment, tooling platform, and application framework

• Apache NiFi

  http://nifi.apache.org/
  Easy to use, powerful, and reliable system to process and distribute data

• Apache Nutch

  http://nutch.apache.org/
  Open Source Web Search Software

• Apache NuttX

  http://nuttx.apache.org
  a mature, real-time embedded operating system (RTOS)

• Apache OFBiz

  http://ofbiz.apache.org/
  Enterprise automation software

• Apache Olingo

  http://olingo.apache.org/
  OASIS OData protocol libraries

• Apache Oozie

  http://oozie.apache.org/
  A workflow scheduler system to manage Apache Hadoop jobs.

• Apache OpenJPA

  http://openjpa.apache.org/
  Object Relational Mapping for Java

• Apache OpenMeetings

  http://openmeetings.apache.org/
  Web-Conferencing and real-time collaboration

• Apache OpenNLP

  http://opennlp.apache.org/
  Machine learning based toolkit for the processing of natural language text

• Apache OpenOffice

  http://openoffice.apache.org/
  An open-source, office-document productivity suite

• Apache OpenWebBeans

  http://openwebbeans.apache.org/
  JSR-299 Context and Dependency Injection for Java EE Platform Implementation

• Apache OpenWhisk

  http://openwhisk.apache.org/
  a platform for building serverless applications with functions

• Apache ORC

  http://orc.apache.org/
  the smallest, fastest columnar storage for Hadoop workloads

• Apache Ozone

  http://ozone.apache.org
  a distributed object store for Hadoop-based and Cloud-native environments

• Apache Parquet

  http://parquet.apache.org/
  columnar storage format available to any project in the Apache Hadoop ecosystem

• Apache PDFBox

  http://pdfbox.apache.org/
  Java library for working with PDF documents

• Apache Perl

  http://perl.apache.org/
  Dynamic websites using Perl

• Apache Petri

  http://petri.apache.org
  assessment of, education in, and adoption of the Foundation's policies and procedures for collaborative development and the pros and cons of joining the Foundation

• Apache Phoenix

  http://phoenix.apache.org/
  High performance relational database layer over Apache HBase for low latency applications

• Apache Pig

  http://pig.apache.org/
  Platform for analyzing large data sets

• Apache Pinot

  http://pinot.apache.org
  distributed OLAP data store to provide Real-time Analytics to power wide variety of analytical use case

• Apache Pivot

  http://pivot.apache.org/
  Rich Internet applications in Java

• Apache PLC4X

  http://plc4x.apache.org/
  a set of libraries for communicating with industrial programmable logic controllers (PLCs) using a variety of protocols but with a shared API

• Apache POI

  http://poi.apache.org/
  Java API for OLE 2 Compound and OOXML Documents

• Apache Portable Runtime (APR)

  http://apr.apache.org/
  Apache Portable Runtime libraries

• Apache Portals

  http://portals.apache.org/
  Portal technology

• Apache Pulsar

  http://pulsar.apache.org/
  highly scalable, low latency messaging platform running on commodity hardware

• Apache Qpid

  http://qpid.apache.org/
  Multiple language implementation of the latest Advanced Message Queuing Protocol (AMQP)

• Apache Ranger

  http://ranger.apache.org/
  framework to enable, monitor and manage comprehensive data security across the Hadoop platform.

• Apache Ratis

  http://ratis.apache.org
  a highly customizable Raft protocol implementation in Java

• Apache RocketMQ

  http://rocketmq.apache.org/
  a fast, low latency, reliable, scalable, distributed, easy to use message-oriented middleware, especially for processing large amounts of streaming data

• Apache Roller

  http://roller.apache.org/
  Java blog server

• Apache Royale

  http://royale.apache.org/
  improving developer productivity in creating applications for wherever Javascript runs (and other runtimes)

• Apache Rya

  http://rya.apache.org/
  scalable storage, retrieval, and analysis of RDF data

• Apache Samza

  http://samza.apache.org/
  distributed stream processing framework

• Apache Santuario

  http://santuario.apache.org/
  XML Security in Java and C++

• Apache Sedona

  http://sedona.apache.org
  a big geospatial data processing engine. It provides an easy to use APIs for spatial data scientists to manage, wrangle, and process geospatial data

• Apache Serf

  http://serf.apache.org/
  High performance C-based HTTP client library built upon the Apache Portable Runtime (APR) library

• Apache ServiceComb

  http://servicecomb.apache.org/
  a microservice framework that provides a set of tools and components to make development and deployment of cloud applications easier.

• Apache ServiceMix

  http://servicemix.apache.org/
  Enterprise Service Bus

• Apache ShardingSphere

  http://shardingsphere.apache.org
  a database clustering system providing data sharding, distributed transactions, and distributed database management

• Apache ShenYu

  http://shenyu.apache.org
  a Java native API Gateway for service proxy, protocol conversion and API governance

• Apache Shiro

  http://shiro.apache.org/
  Powerful and easy-to-use application security framework

• Apache SINGA

  http://singa.apache.org/
  a distributed deep learning platform

• Apache SIS

  http://sis.apache.org/
  Spatial Information System

• Apache SkyWalking

  http://skywalking.apache.org/
  application performance management and monitoring (APM)

• Apache Sling

  http://sling.apache.org/
  Web Framework for JCR Content Repositories

• Apache Solr

  http://solr.apache.org
  highly scalable distributed document search and analytics

• Apache SpamAssassin

  http://spamassassin.apache.org/
  Mail filter to identify spam

• Apache Spark

  http://spark.apache.org/
  Fast and general engine for large-scale data processing

• Apache Steve

  http://steve.apache.org/
  Python based single transferable vote software system

• Apache Storm

  http://storm.apache.org/
  Distributed, real-time computation system

• Apache StreamPipes

  http://streampipes.apache.org
  a self-service Industrial IoT toolbox which enables non-technical users to connect, analyze and explore IoT data streams

• Apache Streams

  http://streams.apache.org/
  interoperability of online profiles and activity feeds

• Apache Struts

  http://struts.apache.org/
  Model 2 framework for building Java web applications

• Apache Submarine

  http://submarine.apache.org/
  allowing infrastructure engineers and data scientists to build deep learning applications (TensorFlow, PyTorch, etc.) end to end on cluster management platforms (like YARN/K8s)

• Apache Subversion

  http://subversion.apache.org/
  Version Control

• Apache Superset

  http://superset.apache.org
  data exploration, analysis, visualization, and dashboarding

• Apache Synapse

  http://synapse.apache.org/
  Enterprise Service Bus and Mediation Framework

• Apache Syncope

  http://syncope.apache.org/
  Managing digital identities in enterprise environments

• Apache SystemDS

  http://systemds.apache.org/
  A machine learning platform optimal for big data

• Apache Tapestry

  http://tapestry.apache.org/
  Component-based Java Web Application Framework

• Apache Tcl

  http://tcl.apache.org/
  Dynamic websites using TCL

• Apache Tez

  http://tez.apache.org/
  High-performance and scalable distributed data processing framework

• Apache Thrift

  http://thrift.apache.org/
  Framework for scalable cross-language services development

• Apache Tika

  http://tika.apache.org/
  Content Analysis and Detection Toolkit

• Apache TinkerPop

  http://tinkerpop.apache.org/
  A graph computing framework for both graph databases (OLTP) and graph analytic systems (OLAP)

• Apache Tomcat

  http://tomcat.apache.org/
  A Java Servlet and JSP Container

• Apache TomEE

  http://tomee.apache.org/
  Java EE Web Profile built on Apache Tomcat

• Apache Traffic Control

  http://trafficcontrol.apache.org/
  building, monitoring, configuring, and provisioning a large scale content delivery network (CDN)

• Apache Traffic Server

  http://trafficserver.apache.org/
  A fast, scalable and extensible HTTP/1.1 compliant caching proxy server

• Apache Turbine

  http://turbine.apache.org/
  A Java Servlet Web Application Framework and associated component library

• Apache TVM

  http://tvm.apache.org
  compilation of machine learning models to run on a wide range of hardware platforms

• Apache UIMA

  http://uima.apache.org/
  Framework and annotators for unstructured information analysis

• Apache Unomi

  http://unomi.apache.org/
  providing a reference implementation of the OASIS Customer Data Platform specification currently being worked on by the OASIS Context Server Technical Committee

• Apache VCL

  http://vcl.apache.org/
  Virtual Computing Lab

• Apache Velocity

  http://velocity.apache.org/
  A Java Templating Engine

• Apache Web Services

  http://ws.apache.org/
  Projects related to Web Services

• Apache Whimsy

  http://whimsical.apache.org/
  Tools that help automate various administrative tasks or information lookup activities

• Apache Wicket

  http://wicket.apache.org/
  Component-based Java Web Application Framework.

• Apache Xalan

  http://xalan.apache.org/
  XSLT processors in Java and C++

• Apache Xerces

  http://xerces.apache.org/
  XML parsers in Java, C++ and Perl

• Apache XML Graphics

  http://xmlgraphics.apache.org/
  Conversion from XML to graphical output

• Apache Yetus

  http://yetus.apache.org/
  Collection of libraries and tools that enable contribution and release processes for software projects

• Apache YuniKorn

  http://yunikorn.apache.org
  a standalone resource scheduler responsible for scheduling batch jobs and long-running services on large scale distributed systems running in on-premises environments as well as different public clouds

• Apache Zeppelin

  http://zeppelin.apache.org/
  A web-based notebook that enables interactive data analytics

• Apache ZooKeeper

  http://zookeeper.apache.org/
  Centralized service for maintaining configuration information

• Apache Legal Affairs

  
  

• Apache Security Team

  http://www.apache.org/security/
  Security Team

• Apache Brand Management

  
  

• Apache Conferences

  
  

• Apache Diversity and Inclusion

  
  

• Apache Fundraising

  http://www.apache.org/foundation/contributing.html
  Fund Raising

• Apache Marketing and Publicity

  http://www.apache.org/press/
  public relations and for the press-related issues

• Apache Travel Assistance

  http://www.apache.org/travel/
  Travel Assistance Committee

• Apache Data Privacy

  
  

---