The Apache Software Foundation

  1. Apache HTTP Server (httpd): A robust, commercial-grade, featureful, and mature web server used to serve web content across the Internet.
  2. Apache Hadoop: An open-source framework for distributed storage and processing of big data using the MapReduce programming model.
  3. Apache Spark: A fast and general engine for large-scale data processing, known for its speed and ease of use.
  4. Apache Cassandra: A highly scalable, high-performance distributed database designed to handle large amounts of data across many commodity servers.
  5. Apache Kafka: A platform for building real-time data pipelines and streaming apps, used by thousands of companies for high-performance data pipelines.
  6. Apache Maven: A software project management tool that can manage a project's build, reporting, and documentation from a central piece of information.
  7. Apache Tomcat: A servlet container developed by the Apache Software Foundation (ASF) as part of the Jakarta Project, providing an HTTP web server environment for Java code to run in.
  8. Apache OpenOffice: A free, open-source office suite, including a word processor, spreadsheet, presentation software, and database management system.
  9. Apache Subversion (SVN): A version control system used for tracking changes in source code during software development.
  10. Apache CloudStack: An open-source cloud computing software used for building public and private Infrastructure as a Service (IaaS) clouds.
  11. Apache Flex: A software development kit used to build and maintain Adobe Flash applications that can run on the Adobe Flash Player.
  12. Apache Avro: A data serialization system, used for data-centric systems like Hadoop. It's designed for data-intensive applications with requirements not well served by existing solutions.
  13. Apache Pulsar: An open-source distributed messaging and streaming platform that provides low-latency, high-throughput, and reliable message delivery.
  14. Apache NiFi: A user-friendly interface for automating the flow of data between systems, enabling efficient data ingestion, transformation, and distribution.
  15. Apache Druid: An open-source, high-performance, column-oriented, distributed data store designed for fast, ad-hoc querying on large datasets.
These are some of the notable projects maintained by The Apache Software Foundation. There are many more lesser-known but equally valuable projects as well.