Apache Spark - A unified analytics engine for large-scale data processing
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The java implementation of Apache Dubbo. An RPC and microservice framework.
Apache Kafka - A distributed event streaming platform
Apache Flink
Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.
🔎 Open source distributed and RESTful search engine.
Apache ZooKeeper
An asynchronous, callback-based Http client for Android built on top of Apache's HttpClient libraries.
Activiti is a light-weight workflow and Business Process Management (BPM) Platform targeted at business people, developers and system admins. Its core is a super-fast and rock-solid BPMN 2 process engine for Java. It's open-source and distributed under the Apache license. Activiti runs in any Java application, on a server, on a cluster or in the cloud. It integrates perfectly with Spring, it is extremely lightweight and based on simple concepts.
Open source transactional distributed database. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure without compromising performance.
Apache JMeter open-source load testing tool for analyzing and measuring the performance of a variety of services
Apache Beam is a unified programming model for Batch and Streaming data processing.
Apache Camel is an open source integration framework with 350+ connectors. Write routes in Java, YAML, or XML. Run on Spring Boot, Quarkus, or standalone. Apache License 2.0.
Apache KIE (Knowledge Is Everything) is the home of Drools, OptaPlanner, jBPM, and Kogito.
Apache NiFi
A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.
The Apache Guacamole proxy daemon (guacd), C API (libguac), and protocol support.
A better compressed bitset in Java: used by Apache Spark, Netflix Atlas, Apache Pinot, Tablesaw, and many others
Apache Cordova Android
Apache Avro is a data serialization system.
Apache NetBeans
An XMPP server licensed under the Open Source Apache License.
Apache Flume is a distributed, reliable, and available service for efficiently collecting, aggregating, and moving large amounts of log-like data
Apache ActiveMQ