The Apache Software Foundation

A Q&A platform software for teams at any scales. Whether it's a community forum, help center, or knowledge management platform, you can always count on Apache Answer.

Language: Go
Licence: Apache-2.0
Stars: 16k
Latest: v2.0.3
Last push: 2026-11-11

Apache Hadoop

Language: Java
Licence: Apache-2.0
Stars: 16k
Latest: rel/release-3.5.0
Last push: 2026-11-11

Apache Pulsar

Apache Pulsar - distributed pub-sub messaging system

Language: Java
Licence: Apache-2.0
Stars: 15k
Latest: v5.0.1
Last push: 2026-11-12

Apache DolphinScheduler

Apache DolphinScheduler is the modern data orchestration platform. Agile to create high performance workflow with low-code

Language: Java
Licence: Apache-2.0
Stars: 15k
Latest: 3.4.3
Last push: 2026-11-11

Apache Druid

Apache Druid: a high performance real-time analytics database.

Language: Java
Licence: Apache-2.0
Stars: 14k
Latest: druid-38.0.0
Last push: 2026-11-12

Apache ZooKeeper

Language: Java
Licence: Apache-2.0
Stars: 13k
Latest: release-3.9.7
Last push: 2026-11-10

Apache Cassandra

Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.

Language: Java
Licence: Apache-2.0
Stars: 10k
Latest: cassandra-5.0.9
Last push: 2026-11-11

Apache SeaTunnel

SeaTunnel is a multimodal, high-performance, distributed, massive data integration tool.

Language: Java
Licence: Apache-2.0
Stars: 9.8k
Latest: v3.0.0
Last push: 2026-11-11

Apache JMeter

Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services

Language: Java
Licence: Apache-2.0
Stars: 9.6k
Latest: rel/v5.6.3
Last push: 2026-11-05

Apache DataFusion

Apache DataFusion SQL Query Engine

Language: Rust
Licence: Apache-2.0
Stars: 9.6k
Latest: 55.2.0
Last push: 2026-11-12

Apache Iceberg

Language: Java
Licence: Apache-2.0
Stars: 9.4k
Latest: apache-iceberg-1.12.0
Last push: 2026-11-12

Apache ShenYu

Apache ShenYu is a Java native API Gateway for service proxy, protocol conversion and API governance.

Language: Java
Licence: Apache-2.0
Stars: 8.9k
Latest: v2.7.2
Last push: 2026-11-12

Apache Beam

Apache Beam is a unified programming model for Batch and Streaming data processing.

Language: Java
Licence: Apache-2.0
Stars: 8.7k
Latest: v2.77.0
Last push: 2026-11-12

Apache HertzBeat

An AI-powered next-generation open source real-time observability system.

Language: Java
Licence: Apache-2.0
Stars: 7.5k
Latest: v1.9.0
Last push: 2026-11-11

Apache CouchDB

Seamless multi-primary syncing database with an intuitive HTTP/JSON API, designed for reliability

Language: Erlang
Licence: Apache-2.0
Stars: 7k
Latest: 3.5.3
Last push: 2026-11-12

Apache OpenWhisk

Apache OpenWhisk is an open source serverless cloud platform

Language: Scala
Licence: Apache-2.0
Stars: 6.8k
Latest: 2.0.0
Last push: 2026-11-12

Apache Storm

Language: Java
Licence: Apache-2.0
Stars: 6.7k
Latest: v3.2.0
Last push: 2026-11-11

Apache Zeppelin

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

Language: Java
Licence: Apache-2.0
Stars: 6.7k
Latest: v0.12.1
Last push: 2026-11-12

Apache IoTDB

Language: Java
Licence: Apache-2.0
Stars: 6.4k
Latest: v2.0.11
Last push: 2026-11-12

Apache Hudi

Upserts, Deletes And Incremental Processing on Big Data.

Language: Java
Licence: Apache-2.0
Stars: 6.4k
Latest: release-1.2.1
Last push: 2026-11-12

Apache NiFi

Language: Java
Licence: Apache-2.0
Stars: 6.3k
Latest: rel/nifi-2.12.0
Last push: 2026-11-12

Apache Pinot

Apache Pinot: a real-time analytics database for low-latency SQL and vector search, serving user-facing and agent-facing applications

Language: Java
Licence: Apache-2.0
Stars: 6.2k
Latest: release-1.6.0
Last push: 2026-11-11

Apache HBase

Language: Java
Licence: Apache-2.0
Stars: 5.6k
Latest: rel/3.0.0
Last push: 2026-11-12

Apache Maven

Apache Maven core

Language: Java
Licence: Apache-2.0
Stars: 5.4k
Latest: maven-3.10.0
Last push: 2026-11-12

Apache Iggy

Apache Iggy: Hyper-Efficient Message Streaming at Laser Speed

Language: Rust
Licence: Apache-2.0
Stars: 5.3k
Latest: server-0.10.0
Last push: 2026-11-11

Apache AGE

Graph database optimized for fast analysis and real-time data processing. It is provided as an extension to PostgreSQL.

Language: C
Licence: Apache-2.0
Stars: 4.9k
Latest: PG18/v1.8.0-rc0
Last push: 2026-11-04

Apache Kvrocks

Apache Kvrocks is a distributed key value NoSQL database that uses RocksDB as storage engine and is compatible with Redis protocol.

Language: C++
Licence: Apache-2.0
Stars: 4.5k
Latest: v2.17.0
Last push: 2026-11-11

Apache HTTP Server

Language: C
Licence: Apache-2.0
Stars: 4k
Latest: 2.4.71
Last push: 2026-11-11

Apache Guacamole

The Apache Guacamole proxy daemon (guacd), C API (libguac), and protocol support.

Language: C
Licence: Apache-2.0
Stars: 4k
Latest: 1.6.0
Last push: 2026-11-03

Apache Kylin

Language: Java
Licence: Apache-2.0
Stars: 3.8k
Latest: kylin-5.0.2
Last push: 2026-11-11

Apache Lucene

Apache Lucene open-source search software

Language: Java
Licence: Apache-2.0
Stars: 3.6k
Latest: releases/lucene/10.6.0
Last push: 2026-11-11

Apache Paimon

Apache Paimon is a lake format that enables building a Realtime Lakehouse Architecture with Flink and Spark for both streaming and batch operations.

Language: Java
Licence: Apache-2.0
Stars: 3.4k
Latest: release-2.1.0
Last push: 2026-11-12

Apache Gravitino

World's most powerful open data catalog for building a high-performance, geo-distributed and federated metadata lake.

Language: Java
Licence: Apache-2.0
Stars: 3.4k
Latest: v1.3.1
Last push: 2026-11-12

Apache HugeGraph

A graph database that supports more than 100+ billion data, high performance and scalability (Include OLTP Engine & REST-API & Backends)

Language: Java
Licence: Apache-2.0
Stars: 3.2k
Latest: 1.7.0
Last push: 2026-11-08

Apache NetBeans

Language: Java
Licence: Apache-2.0
Stars: 3.2k
Latest: 31
Last push: 2026-11-10

Apache CloudStack

Apache CloudStack is an opensource Infrastructure as a Service (IaaS) cloud computing platform

Language: Java
Licence: Apache-2.0
Stars: 3.1k
Latest: 4.23.0.0
Last push: 2026-11-11

Apache ActiveMQ

Language: Java
Licence: Apache-2.0
Stars: 2.5k
Latest: activemq-6.4.0
Last push: 2026-11-12

Apache Atlas

Apache Atlas - Open Metadata Management and Governance capabilities across the Hadoop platform and beyond

Language: Java
Licence: Apache-2.0
Stars: 2.2k
Latest: release-2.5.0
Last push: 2026-10-30

Apache Polaris

Apache Polaris, the interoperable, open source catalog for Apache Iceberg

Language: Java
Licence: Apache-2.0
Stars: 2.1k
Latest: apache-polaris-1.8.0
Last push: 2026-11-12

Apache Traffic Server

Apache Traffic Server™ is a fast, scalable and extensible HTTP/1.1 and HTTP/2 compliant caching proxy server.

Language: C++
Licence: Apache-2.0
Stars: 2k
Latest: 10.2.1
Last push: 2026-11-11

Apache Solr

Apache Solr open-source search software

Language: Java
Licence: Apache-2.0
Stars: 1.7k
Latest: releases/solr/10.1.0
Last push: 2026-11-12

Apache Pekko

Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala

Language: Scala
Licence: Apache-2.0
Stars: 1.7k
Latest: v2.0.0
Last push: 2026-11-11

Apache Hop

Hop Orchestration Platform

Language: Java
Licence: Apache-2.0
Stars: 1.5k
Latest: 2.20.0-rc1
Last push: 2026-11-11

Apache Cloudberry

One advanced and mature open-source MPP (Massively Parallel Processing) database. Open source alternative to Greenplum Database.

Language: C
Licence: Apache-2.0
Stars: 1.4k
Latest: 2.2.0-incubating
Last push: 2026-11-12

Apache Accumulo

Language: Java
Licence: Apache-2.0
Stars: 1.2k
Latest: rel/3.0.0
Last push: 2026-11-10

Apache OFBiz

Apache OFBiz is an open source product for the automation of enterprise processes. It includes framework components and business applications for ERP, CRM, E-Business/E-Commerce, Supply Chain Management and Manufacturing Resource Planning. OFBiz provides a foundation and starting point for reliable, secure and scalable enterprise solutions.

Language: Java
Licence: Apache-2.0
Stars: 1.1k
Latest: release24.09.08
Last push: 2026-11-12

Apache ActiveMQ Artemis

Apache Artemis

Language: Java
Licence: Apache-2.0
Stars: 1.1k
Latest: 2.57.0
Last push: 2026-11-12

Apache James

Emails at the heart of your business logic!

Language: Java
Licence: Apache-2.0
Stars: 1.1k
Latest: james-project-3.9.1
Last push: 2026-11-12

Apache OpenMeetings

Mirror of Apache Openmeetings

Language: Java
Licence: Other
Stars: 690
Latest: 9.1.0
Last push: 2026-11-08

Apache Subversion

Mirror of Apache Subversion

Language: C
Licence: Apache-2.0
Stars: 654
Latest: 1.15.0
Last push: 2026-11-08