The Apache Software Foundation was formed in 1999 and is one of the most active organisations in developing, maintaining and distributing Open Source software.
Apache distributions include:
Apache HTTP Server: A widely-used web server software that serves web content over the internet. Apache Hadoop: A framework that allows for the distributed processing of large data sets across clusters of computers. Apache Spark: An open-source unified analytics engine for large-scale data processing, with built-in modules for streaming, SQL, machine learning, and graph processing. Apache Tomcat: An open-source implementation of the Java Servlet, JavaServer Pages, and Java Expression Language technologies. Apache Kafka: A distributed event streaming platform capable of handling trillions of events a day. Apache Cassandra: A highly scalable, high-performance distributed NoSQL database designed to handle large amounts of data across many commodity servers. Apache ActiveMQ: A highly scalable and reliable message broker. Further reading List of Apache Software Foundation projects - Wikipedia